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Ubuntu Security Notice USN-6626-1

Ubuntu Security Notice 6626-1 - Quentin Minster discovered that a race condition existed in the KSMBD implementation in the Linux kernel when handling sessions operations. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code. Marek Marczykowski-Górecki discovered that the Xen event channel infrastructure implementation in the Linux kernel contained a race condition. An attacker in a guest VM could possibly use this to cause a denial of service.

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==========================================================================Ubuntu Security Notice USN-6626-1February 08, 2024linux, linux-aws, linux-aws-5.15, linux-gcp, linux-gcp-5.15, linux-gke,linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-ibm-5.15,linux-kvm, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle,linux-oracle-5.15 vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 22.04 LTS- Ubuntu 20.04 LTSSummary:Several security issues were fixed in the Linux kernel.Software Description:- linux: Linux kernel- linux-aws: Linux kernel for Amazon Web Services (AWS) systems- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems- linux-gke: Linux kernel for Google Container Engine (GKE) systems- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems- linux-ibm: Linux kernel for IBM cloud systems- linux-kvm: Linux kernel for cloud environments- linux-nvidia: Linux kernel for NVIDIA systems- linux-oracle: Linux kernel for Oracle Cloud systems- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems- linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems- linux-gkeop-5.15: Linux kernel for Google Container Engine (GKE) systems- linux-hwe-5.15: Linux hardware enablement (HWE) kernel- linux-ibm-5.15: Linux kernel for IBM cloud systems- linux-lowlatency-hwe-5.15: Linux low latency kernel- linux-oracle-5.15: Linux kernel for Oracle Cloud systemsDetails:Quentin Minster discovered that a race condition existed in the KSMBDimplementation in the Linux kernel when handling sessions operations. Aremote attacker could use this to cause a denial of service (system crash)or possibly execute arbitrary code. (CVE-2023-32250, CVE-2023-32252,CVE-2023-32257)Marek Marczykowski-Górecki discovered that the Xen event channelinfrastructure implementation in the Linux kernel contained a racecondition. An attacker in a guest VM could possibly use this to cause adenial of service (paravirtualized device unavailability). (CVE-2023-34324)Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driverin the Linux kernel during device removal. A privileged attacker could usethis to cause a denial of service (system crash). (CVE-2023-35827)Tom Dohrmann discovered that the Secure Encrypted Virtualization (SEV)implementation for AMD processors in the Linux kernel contained a racecondition when accessing MMIO registers. A local attacker in a SEV guest VMcould possibly use this to cause a denial of service (system crash) orpossibly execute arbitrary code. (CVE-2023-46813)It was discovered that the Microchip USB Ethernet driver in the Linuxkernel contained a race condition during device removal, leading to a use-after-free vulnerability. A physically proximate attacker could use this tocause a denial of service (system crash). (CVE-2023-6039)It was discovered that the TLS subsystem in the Linux kernel did notproperly perform cryptographic operations in some situations, leading to anull pointer dereference vulnerability. A local attacker could use this tocause a denial of service (system crash) or possibly execute arbitrarycode. (CVE-2023-6176)Xingyuan Mo discovered that the netfilter subsystem in the Linux kernel didnot properly handle dynset expressions passed from userspace, leading to anull pointer dereference vulnerability. A local attacker could use this tocause a denial of service (system crash). (CVE-2023-6622)It was discovered that the TIPC protocol implementation in the Linux kerneldid not properly handle locking during tipc_crypto_key_revoke() operations.A local attacker could use this to cause a denial of service (kerneldeadlock). (CVE-2024-0641)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 22.04 LTS:   linux-image-5.15.0-1036-gkeop   5.15.0-1036.42   linux-image-5.15.0-1044-nvidia  5.15.0-1044.44   linux-image-5.15.0-1044-nvidia-lowlatency  5.15.0-1044.44   linux-image-5.15.0-1046-ibm     5.15.0-1046.49   linux-image-5.15.0-1050-gke     5.15.0-1050.55   linux-image-5.15.0-1050-kvm     5.15.0-1050.55   linux-image-5.15.0-1051-gcp     5.15.0-1051.59   linux-image-5.15.0-1051-oracle  5.15.0-1051.57   linux-image-5.15.0-1053-aws     5.15.0-1053.58   linux-image-5.15.0-94-generic   5.15.0-94.104   linux-image-5.15.0-94-generic-64k  5.15.0-94.104   linux-image-5.15.0-94-generic-lpae  5.15.0-94.104   linux-image-aws-lts-22.04       5.15.0.1053.52   linux-image-gcp-lts-22.04       5.15.0.1051.47   linux-image-generic             5.15.0.94.91   linux-image-generic-64k         5.15.0.94.91   linux-image-generic-lpae        5.15.0.94.91   linux-image-gke                 5.15.0.1050.49   linux-image-gke-5.15            5.15.0.1050.49   linux-image-gkeop               5.15.0.1036.35   linux-image-gkeop-5.15          5.15.0.1036.35   linux-image-ibm                 5.15.0.1046.42   linux-image-kvm                 5.15.0.1050.46   linux-image-nvidia              5.15.0.1044.44   linux-image-nvidia-lowlatency   5.15.0.1044.44   linux-image-oracle              5.15.0.1051.46   linux-image-oracle-lts-22.04    5.15.0.1051.46   linux-image-virtual             5.15.0.94.91Ubuntu 20.04 LTS:   linux-image-5.15.0-1036-gkeop   5.15.0-1036.42~20.04.1   linux-image-5.15.0-1046-ibm     5.15.0-1046.49~20.04.1   linux-image-5.15.0-1051-gcp     5.15.0-1051.59~20.04.1   linux-image-5.15.0-1051-oracle  5.15.0-1051.57~20.04.1   linux-image-5.15.0-1053-aws     5.15.0-1053.58~20.04.1   linux-image-5.15.0-94-generic   5.15.0-94.104~20.04.1   linux-image-5.15.0-94-generic-64k  5.15.0-94.104~20.04.1   linux-image-5.15.0-94-generic-lpae  5.15.0-94.104~20.04.1   linux-image-5.15.0-94-lowlatency  5.15.0-94.104~20.04.1   linux-image-5.15.0-94-lowlatency-64k  5.15.0-94.104~20.04.1   linux-image-aws                 5.15.0.1053.58~20.04.41   linux-image-gcp                 5.15.0.1051.59~20.04.1   linux-image-generic-64k-hwe-20.04  5.15.0.94.104~20.04.50   linux-image-generic-hwe-20.04   5.15.0.94.104~20.04.50   linux-image-generic-lpae-hwe-20.04  5.15.0.94.104~20.04.50   linux-image-gkeop-5.15          5.15.0.1036.42~20.04.32   linux-image-ibm                 5.15.0.1046.49~20.04.18   linux-image-lowlatency-64k-hwe-20.04  5.15.0.94.104~20.04.47   linux-image-lowlatency-hwe-20.04  5.15.0.94.104~20.04.47   linux-image-oem-20.04           5.15.0.94.104~20.04.50   linux-image-oem-20.04b          5.15.0.94.104~20.04.50   linux-image-oem-20.04c          5.15.0.94.104~20.04.50   linux-image-oem-20.04d          5.15.0.94.104~20.04.50   linux-image-oracle              5.15.0.1051.57~20.04.1   linux-image-virtual-hwe-20.04   5.15.0.94.104~20.04.50After a standard system update you need to reboot your computer to makeall the necessary changes.ATTENTION: Due to an unavoidable ABI change the kernel updates havebeen given a new version number, which requires you to recompile andreinstall all third party kernel modules you might have installed.Unless you manually uninstalled the standard kernel metapackages(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,linux-powerpc), a standard system upgrade will automatically performthis as well.References:   https://ubuntu.com/security/notices/USN-6626-1   CVE-2023-32250, CVE-2023-32252, CVE-2023-32257, CVE-2023-34324,   CVE-2023-35827, CVE-2023-46813, CVE-2023-6039, CVE-2023-6176,   CVE-2023-6622, CVE-2024-0641Package Information:   https://launchpad.net/ubuntu/+source/linux/5.15.0-94.104   https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1053.58   https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1051.59   https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1050.55   https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1036.42   https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1046.49   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1050.55   https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1044.44   https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1051.57   https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1053.58~20.04.1   https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1051.59~20.04.1   https://launchpad.net/ubuntu/+source/linux-gkeop-5.15/5.15.0-1036.42~20.04.1   https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-94.104~20.04.1   https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1046.49~20.04.1 https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-94.104~20.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1051.57~20.04.1

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