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Red Hat Security Advisory 2023-0854-01

Red Hat Security Advisory 2023-0854-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow and use-after-free vulnerabilities.

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====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2023:0854-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0854
Issue date: 2023-02-21
CVE Names: CVE-2022-2873 CVE-2022-41222 CVE-2022-43945
====================================================================

  1. Summary:

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.

  1. Relevant releases/architectures:

Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64
Red Hat Enterprise Linux for Real Time (v. 8) - x86_64

  1. 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: mm/mremap.c use-after-free vulnerability (CVE-2022-41222)

  • kernel: nfsd buffer overflow by RPC message over TCP with garbage data
    (CVE-2022-43945)

  • kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873)

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):

  • RHEL8-RT: Backport use of a dedicate thread for timer wakeups
    (BZ#2127204)

  • SNO Crashed twice - kernel BUG at lib/list_debug.c:28 (BZ#2132062)

  • Cannot trigger kernel dump using NMI on SNO node running PAO and RT
    kernel [RT-8] (BZ#2139851)

  • scheduling while atomic in fpu_clone() -> fpu_inherit_perms()
    (BZ#2154469)

  • The latest RHEL 8.7.z2 kernel changes need to be merged into the RT
    source tree to keep source parity between the two kernels. (BZ#2159806)

  1. 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.

  1. Bugs fixed (https://bugzilla.redhat.com/):

2119048 - CVE-2022-2873 kernel: an out-of-bounds vulnerability in i2c-ismt driver
2138818 - CVE-2022-41222 kernel: mm/mremap.c use-after-free vulnerability
2141752 - CVE-2022-43945 kernel: nfsd buffer overflow by RPC message over TCP with garbage data

  1. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 8):

Source:
kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.src.rpm

x86_64:
kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-kvm-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm

Red Hat Enterprise Linux for Real Time (v. 8):

Source:
kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.src.rpm

x86_64:
kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
kernel-rt-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

  1. References:

https://access.redhat.com/security/cve/CVE-2022-2873
https://access.redhat.com/security/cve/CVE-2022-41222
https://access.redhat.com/security/cve/CVE-2022-43945
https://access.redhat.com/security/updates/classification/#important

  1. Contact:

The Red Hat security contact is [email protected]. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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Ubuntu Security Notice 5813-1 - It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service or possibly 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.

Scanvus now supports Vulners and Vulns.io VM Linux vulnerability detection APIs

Hello everyone! Great news for my open source Scanvus project! You can now perform vulnerability checks on Linux hosts and docker images not only using the Vulners.com API, but also with the Vulns.io VM API. It’s especially nice that all the code to support the new API was written and contributed by colleagues from Vulns.io. […]

RHSA-2022:8973: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel 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-2022-1158: kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region * CVE-2022-2639: kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() * CVE-2022-2959: kernel: watch queue race condition can lead to privilege escalation * CVE-2022-21123: hw: cpu: incomplete clean-up of multi-co...

RHSA-2022:8974: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt 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-2022-1158: kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region * CVE-2022-2639: kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() * CVE-2022-2959: kernel: watch queue race condition can lead to privilege escalation * CVE-2022-21123: hw: cpu: incomplete clean-up of multi...

Ubuntu Security Notice USN-5754-2

Ubuntu Security Notice 5754-2 - It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a memory leak existed in the IPv6 implementation of the Linux kernel. A local attacker could use this to cause a denial of service.

CVE-2022-41802: en/security-disclosure/2022/2022-12.md · OpenHarmony/security - Gitee.com

Kernel subsystem within OpenHarmony-v3.1.4 and prior versions in kernel_liteos_a has a kernel stack overflow vulnerability when call SysClockGetres. 4 bytes padding data from kernel stack are copied to user space incorrectly and leaked.

Ubuntu Security Notice USN-5754-1

Ubuntu Security Notice 5754-1 - It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a memory leak existed in the IPv6 implementation of the Linux kernel. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-5728-3

Ubuntu Security Notice 5728-3 - Jann Horn discovered that the Linux kernel did not properly track memory allocations for anonymous VMA mappings in some situations, leading to potential data structure reuse. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a race condition existed in the memory address space accounting implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-5728-2

Ubuntu Security Notice 5728-2 - Jann Horn discovered that the Linux kernel did not properly track memory allocations for anonymous VMA mappings in some situations, leading to potential data structure reuse. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a race condition existed in the memory address space accounting implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-5728-1

Ubuntu Security Notice 5728-1 - Jann Horn discovered that the Linux kernel did not properly track memory allocations for anonymous VMA mappings in some situations, leading to potential data structure reuse. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a race condition existed in the memory address space accounting implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-5623-1

Ubuntu Security Notice 5623-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-5616-1

Ubuntu Security Notice 5616-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. Moshe Kol, Amit Klein and Yossi Gilad discovered that the IP implementation in the Linux kernel did not provide sufficient randomization when calculating port offsets. An attacker could possibly use this to expose sensitive information.

Ubuntu Security Notice USN-5602-1

Ubuntu Security Notice 5602-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. It was discovered that the IP implementation in the Linux kernel did not provide sufficient randomization when calculating port offsets. An attacker could possibly use this to expose sensitive information.

Ubuntu Security Notice USN-5599-1

Ubuntu Security Notice 5599-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. It was discovered that the IP implementation in the Linux kernel did not provide sufficient randomization when calculating port offsets. An attacker could possibly use this to expose sensitive information.

Ubuntu Security Notice USN-5594-1

Ubuntu Security Notice 5594-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. It was discovered that the IP implementation in the Linux kernel did not provide sufficient randomization when calculating port offsets. An attacker could possibly use this to expose sensitive information.

CVE-2022-2873: Fix an out-of-bounds bug in ismt_access()

An out-of-bounds memory access flaw was found in the Linux kernel Intel’s iSMT SMBus host controller driver in the way a user triggers the I2C_SMBUS_BLOCK_DATA (with the ioctl I2C_SMBUS) with malicious input data. This flaw allows a local user to crash the system.

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