Medium: kernel

Issue Overview:

A use-after-free vulnerability was found in the Linux kernel’s ext4 filesystem in the way it handled the extra inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors. (CVE-2023-2513)

qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed QFQ_MIN_LMAX. (CVE-2023-31436)

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-4.14.314-237.533.amzn2.aarch64  
    kernel-headers-4.14.314-237.533.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.314-237.533.amzn2.aarch64  
    perf-4.14.314-237.533.amzn2.aarch64  
    perf-debuginfo-4.14.314-237.533.amzn2.aarch64  
    python-perf-4.14.314-237.533.amzn2.aarch64  
    python-perf-debuginfo-4.14.314-237.533.amzn2.aarch64  
    kernel-tools-4.14.314-237.533.amzn2.aarch64  
    kernel-tools-devel-4.14.314-237.533.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.314-237.533.amzn2.aarch64  
    kernel-devel-4.14.314-237.533.amzn2.aarch64  
    kernel-debuginfo-4.14.314-237.533.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.314-237.533.amzn2.i686  
  
src:  
    kernel-4.14.314-237.533.amzn2.src  
  
x86_64:  
    kernel-4.14.314-237.533.amzn2.x86_64  
    kernel-headers-4.14.314-237.533.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.314-237.533.amzn2.x86_64  
    perf-4.14.314-237.533.amzn2.x86_64  
    perf-debuginfo-4.14.314-237.533.amzn2.x86_64  
    python-perf-4.14.314-237.533.amzn2.x86_64  
    python-perf-debuginfo-4.14.314-237.533.amzn2.x86_64  
    kernel-tools-4.14.314-237.533.amzn2.x86_64  
    kernel-tools-devel-4.14.314-237.533.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.314-237.533.amzn2.x86_64  
    kernel-devel-4.14.314-237.533.amzn2.x86_64  
    kernel-debuginfo-4.14.314-237.533.amzn2.x86_64  
    kernel-livepatch-4.14.314-237.533-1.0-0.amzn2.x86_64  

Additional References

Red Hat: CVE-2023-2513, CVE-2023-31436

Mitre: CVE-2023-2513, CVE-2023-31436