Headline
RHSA-2023:1584: Red Hat Security Advisory: kernel-rt security and bug fix update
An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Related CVEs:
- CVE-2022-4269: A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action “mirred”) a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.
- CVE-2022-4378: A stack overflow flaw was found in the Linux kernel’s SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.
- CVE-2023-0266: A use-after-free flaw was found in the ALSA subsystem in sound/core/control.c in the Linux kernel. This flaw allows a local attacker to cause a use-after-free issue.
- CVE-2023-0386: A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.
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Issued:
2023-04-04
Updated:
2023-04-04
RHSA-2023:1584 - Security Advisory
- Overview
- Updated Packages
Synopsis
Important: kernel-rt security and bug fix update
Type/Severity
Security Advisory: Important
Red Hat Insights patch analysis
Identify and remediate systems affected by this advisory.
View affected systems
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
- kernel: stack overflow in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378)
- ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)
- kernel: FUSE filesystem low-privileged user privileges escalation (CVE-2023-0386)
- kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
- Lazy irq_work does not raise softirq on PREEMPT_RT [rhel-8] (BZ#2172163)
- The latest RHEL 8.7.z3 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2172278)
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
Affected Products
- Red Hat Enterprise Linux for Real Time 8 x86_64
- Red Hat Enterprise Linux for Real Time for NFV 8 x86_64
Fixes
- BZ - 2150272 - CVE-2022-4269 kernel: net: CPU soft lockup in TC mirred egress-to-ingress action
- BZ - 2152548 - CVE-2022-4378 kernel: stack overflow in do_proc_dointvec and proc_skip_spaces
- BZ - 2159505 - CVE-2023-0386 kernel: FUSE filesystem low-privileged user privileges escalation
- BZ - 2163379 - CVE-2023-0266 ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF
CVEs
- CVE-2022-4269
- CVE-2022-4378
- CVE-2023-0266
- CVE-2023-0386
Red Hat Enterprise Linux for Real Time 8
SRPM
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.src.rpm
SHA-256: 98e32c4eba7260d02c31d9d0f8d05293108c43224425e899e71818ba818cac60
x86_64
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 0e7e5f21650dddff84e0ca8165ba56444ab0bf390f4d397c9fde19faab3b2a41
kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: fd49b8f0ca50edefbfde71619860d0d8dcc4ea36a7c1c7c68dd30e235f9c6268
kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 66314962f318e1fd6b10a07de854493e70bec31328c4862098d1d3c6baf3da13
kernel-rt-debug-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: c50a96461b2e017c280760ff064a0407c44e64ff5afb22ba53b6e9f645c2e282
kernel-rt-debug-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 710181da5867b62f83e14f4edc597a1c8bc290b71224d3551941c1c2f950f544
kernel-rt-debug-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 47b3c3789fd5dd59bfb4e8ef5b34eb2a6bbe5dd0487fb4d671eb4df491ef3898
kernel-rt-debug-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 8d2563a158594bdeaf2fbe0719de2b2739a35c7b5821cc9e29c807aab4c15c29
kernel-rt-debug-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: a653114023062b561a5c2368fa368f6d9dabcc33c8b7ad866d66012f78bb5a26
kernel-rt-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 5432f03630348927a46bba1724d3fe6afe18740bce5c13a45bb616e4c02007a2
kernel-rt-debuginfo-common-x86_64-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: ac8245405c59b3fa369650b1ce9bd7ce8ac23147fdb4c74fe00a5c059dd3959f
kernel-rt-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 1d0156aade8a21db05039d29647be6cf65f0e472041212c3c935cead833ecdcc
kernel-rt-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 59e4db38e3cdbb979b9da1c52a996d9cdf266941422f3fca9459cd87bf39d479
kernel-rt-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: d77868ceed39de7abf6c04dc18dd0642e2f4e8dfbd5cf153d9cfe117fe3971e1
Red Hat Enterprise Linux for Real Time for NFV 8
SRPM
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.src.rpm
SHA-256: 98e32c4eba7260d02c31d9d0f8d05293108c43224425e899e71818ba818cac60
x86_64
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 0e7e5f21650dddff84e0ca8165ba56444ab0bf390f4d397c9fde19faab3b2a41
kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: fd49b8f0ca50edefbfde71619860d0d8dcc4ea36a7c1c7c68dd30e235f9c6268
kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 66314962f318e1fd6b10a07de854493e70bec31328c4862098d1d3c6baf3da13
kernel-rt-debug-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: c50a96461b2e017c280760ff064a0407c44e64ff5afb22ba53b6e9f645c2e282
kernel-rt-debug-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 710181da5867b62f83e14f4edc597a1c8bc290b71224d3551941c1c2f950f544
kernel-rt-debug-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 47b3c3789fd5dd59bfb4e8ef5b34eb2a6bbe5dd0487fb4d671eb4df491ef3898
kernel-rt-debug-kvm-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: bc0e06dcfbd896d78ccfa14f1f0eeb5beb2a00205f989e0b9ef40ef92c66f66b
kernel-rt-debug-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 8d2563a158594bdeaf2fbe0719de2b2739a35c7b5821cc9e29c807aab4c15c29
kernel-rt-debug-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: a653114023062b561a5c2368fa368f6d9dabcc33c8b7ad866d66012f78bb5a26
kernel-rt-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 5432f03630348927a46bba1724d3fe6afe18740bce5c13a45bb616e4c02007a2
kernel-rt-debuginfo-common-x86_64-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: ac8245405c59b3fa369650b1ce9bd7ce8ac23147fdb4c74fe00a5c059dd3959f
kernel-rt-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 1d0156aade8a21db05039d29647be6cf65f0e472041212c3c935cead833ecdcc
kernel-rt-kvm-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 23ab912b9e8f40552b5d10875c3ac32feebfb0ff169bec759ac9f0d5ded9db34
kernel-rt-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: 59e4db38e3cdbb979b9da1c52a996d9cdf266941422f3fca9459cd87bf39d479
kernel-rt-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
SHA-256: d77868ceed39de7abf6c04dc18dd0642e2f4e8dfbd5cf153d9cfe117fe3971e1
The Red Hat security contact is [email protected]. More contact details at https://access.redhat.com/security/team/contact/.
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Red Hat Security Advisory 2023-1393-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.10.55.
Ubuntu Security Notice 5979-1 - It was discovered that the KVM VMX implementation in the Linux kernel did not properly handle indirect branch prediction isolation between L1 and L2 VMs. An attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. It was discovered that a race condition existed in the Xen network backend driver in the Linux kernel when handling dropped packets in certain circumstances. An attacker could use this to cause a denial of service.
Red Hat Security Advisory 2023-1470-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a double free vulnerability.
Red Hat Security Advisory 2023-1469-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a double free vulnerability.
An update for kernel is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-4269: A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of se...
An update for kernel-rt is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-4269: A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of...
An update for kpatch-patch is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-3564: A use-after-free flaw was found in the Linux kernel’s L2CAP bluetooth functionality in how a user triggers a race condition by two malicious flows in the L2CAP bluetooth packets. This flaw allows a local or bluetooth connection user to crash the system or potentially escalate privileges. * CVE-2022-4378: A stack ove...
A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.
Red Hat Security Advisory 2023-1221-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include null pointer and use-after-free vulnerabilities.
Red Hat Security Advisory 2023-1202-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service, integer overflow, and use-after-free vulnerabilities.
Red Hat Security Advisory 2023-1220-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a use-after-free vulnerability.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-3564: A use-after-free flaw was found in the Linux kernel’s L2CAP bluetooth functionality in how a user triggers a race condition by two malicious flows in the L2CAP bluetooth packets. This flaw allows a local or bluetooth connection user to crash the system or potentially escalate privileges. * CVE-2022-4378: A stack ove...
An update for kernel is now available for Red Hat Enterprise Linux 8.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-3564: A use-after-free flaw was found in the Linux kernel’s L2CAP bluetooth functionality in how a user triggers a race condition by two malicious flows in the L2CAP bluetooth packets. This flaw allows a local or bluetooth connection user to crash the system or potentially escalate privileges. * CVE-2022-4269: A flaw was found ...
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-3564: A use-after-free flaw was found in the Linux kernel’s L2CAP bluetooth functionality in how a user triggers a race condition by two malicious flows in the L2CAP bluetooth packets. This flaw allows a local or bluetooth connection user to crash the system or potentially escalate privileges. * CVE-2022-4269: A flaw was fou...
Red Hat Security Advisory 2023-1110-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Red Hat Security Advisory 2023-1130-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include null pointer and use-after-free vulnerabilities.
An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2964: A flaw was found in the Linux kernel’s driver for the ASIX AX88179_178A-based USB 2.0/3.0 Gigabit Ethernet Devices. The vulnerability contains multiple out-of-bounds reads and possible out-of-bounds writes. * CVE-2022-4269: A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking co...
An update for kernel is now available for Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, and Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-4378: A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially esc...
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-4378: A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-4378: A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.
An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-4378: A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalat...
Red Hat Security Advisory 2023-0858-01 - This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Issues addressed include a use-after-free vulnerability.
Ubuntu Security Notice 5832-1 - Kyle Zeng discovered that the sysctl implementation in the Linux kernel contained a stack-based buffer overflow. A local attacker could use this to cause a denial of service or execute arbitrary code. Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation in the Linux kernel contained multiple use-after-free vulnerabilities. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code.
Ubuntu Security Notice 5814-1 - Kyle Zeng discovered that the sysctl implementation in the Linux kernel contained a stack-based buffer overflow. A local attacker could use this to cause a denial of service or execute arbitrary code. Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation in the Linux kernel contained multiple use-after-free vulnerabilities. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code.
Ubuntu Security Notice 5803-1 - Kyle Zeng discovered that the sysctl implementation in the Linux kernel contained a stack-based buffer overflow. A local attacker could use this to cause a denial of service or execute arbitrary code. Tamas Koczka discovered that the Bluetooth L2CAP handshake implementation in the Linux kernel contained multiple use-after-free vulnerabilities. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code.
A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.
A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.