ALAS2KERNEL-5.4-2023-045

Amazon Linux 2 Security Advisory: ALASKERNEL-5.4-2023-045
Advisory Release Date: 2023-05-11 17:50 Pacific
Advisory Updated Date: 2023-09-14 01:05 Pacific
Severity: Medium
Issue Overview:

2023-09-14: CVE-2023-2163 was added to this advisory.

bpf: incorrect verifier pruning due to missing register precision taints, which may lead to out-of-band read/write access due to an incorrect verifier conclusion. (CVE-2023-2163)

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 - Kernel-5.4 Extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and 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-5.4.242-155.348.amzn2.aarch64
    kernel-headers-5.4.242-155.348.amzn2.aarch64
    kernel-debuginfo-common-aarch64-5.4.242-155.348.amzn2.aarch64
    perf-5.4.242-155.348.amzn2.aarch64
    perf-debuginfo-5.4.242-155.348.amzn2.aarch64
    python-perf-5.4.242-155.348.amzn2.aarch64
    python-perf-debuginfo-5.4.242-155.348.amzn2.aarch64
    kernel-tools-5.4.242-155.348.amzn2.aarch64
    kernel-tools-devel-5.4.242-155.348.amzn2.aarch64
    kernel-tools-debuginfo-5.4.242-155.348.amzn2.aarch64
    bpftool-5.4.242-155.348.amzn2.aarch64
    bpftool-debuginfo-5.4.242-155.348.amzn2.aarch64
    kernel-devel-5.4.242-155.348.amzn2.aarch64
    kernel-debuginfo-5.4.242-155.348.amzn2.aarch64

i686:
    kernel-headers-5.4.242-155.348.amzn2.i686

src:
    kernel-5.4.242-155.348.amzn2.src

x86_64:
    kernel-5.4.242-155.348.amzn2.x86_64
    kernel-headers-5.4.242-155.348.amzn2.x86_64
    kernel-debuginfo-common-x86_64-5.4.242-155.348.amzn2.x86_64
    perf-5.4.242-155.348.amzn2.x86_64
    perf-debuginfo-5.4.242-155.348.amzn2.x86_64
    python-perf-5.4.242-155.348.amzn2.x86_64
    python-perf-debuginfo-5.4.242-155.348.amzn2.x86_64
    kernel-tools-5.4.242-155.348.amzn2.x86_64
    kernel-tools-devel-5.4.242-155.348.amzn2.x86_64
    kernel-tools-debuginfo-5.4.242-155.348.amzn2.x86_64
    bpftool-5.4.242-155.348.amzn2.x86_64
    bpftool-debuginfo-5.4.242-155.348.amzn2.x86_64
    kernel-devel-5.4.242-155.348.amzn2.x86_64
    kernel-debuginfo-5.4.242-155.348.amzn2.x86_64

Additional References

Red Hat: CVE-2023-2163, CVE-2023-2513, CVE-2023-31436

Mitre: CVE-2023-2163, CVE-2023-2513, CVE-2023-31436