Medium: kernel

Issue Overview:

A buffer overrun vulnerability was found in the netback driver in Xen due to an unusual split packet. This flaw allows an unprivileged guest to cause a denial of service (DoS) of the host by sending network packets to the backend, causing the backend to crash. (CVE-2023-34319)

A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

Affected Packages:

kernel

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update kernel to update your system.

New Packages:

aarch64:  
    kernel-4.14.322-244.536.amzn2.aarch64  
    kernel-headers-4.14.322-244.536.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.322-244.536.amzn2.aarch64  
    perf-4.14.322-244.536.amzn2.aarch64  
    perf-debuginfo-4.14.322-244.536.amzn2.aarch64  
    python-perf-4.14.322-244.536.amzn2.aarch64  
    python-perf-debuginfo-4.14.322-244.536.amzn2.aarch64  
    kernel-tools-4.14.322-244.536.amzn2.aarch64  
    kernel-tools-devel-4.14.322-244.536.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.322-244.536.amzn2.aarch64  
    kernel-devel-4.14.322-244.536.amzn2.aarch64  
    kernel-debuginfo-4.14.322-244.536.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.322-244.536.amzn2.i686  
  
src:  
    kernel-4.14.322-244.536.amzn2.src  
  
x86_64:  
    kernel-4.14.322-244.536.amzn2.x86_64  
    kernel-headers-4.14.322-244.536.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.322-244.536.amzn2.x86_64  
    perf-4.14.322-244.536.amzn2.x86_64  
    perf-debuginfo-4.14.322-244.536.amzn2.x86_64  
    python-perf-4.14.322-244.536.amzn2.x86_64  
    python-perf-debuginfo-4.14.322-244.536.amzn2.x86_64  
    kernel-tools-4.14.322-244.536.amzn2.x86_64  
    kernel-tools-devel-4.14.322-244.536.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.322-244.536.amzn2.x86_64  
    kernel-devel-4.14.322-244.536.amzn2.x86_64  
    kernel-debuginfo-4.14.322-244.536.amzn2.x86_64  
    kernel-livepatch-4.14.322-244.536-1.0-0.amzn2.x86_64  

Additional References

Red Hat: CVE-2023-34319, CVE-2023-4128

Mitre: CVE-2023-34319, CVE-2023-4128