vulnerability
Amazon Linux AMI 2: CVE-2023-4921: Security patch for kernel, kernel-livepatch-4.14.320-243.544, kernel-livepatch-4.14.322-244.536, kernel-livepatch-4.14.322-244.539, kernel-livepatch-4.14.322-246.539, kernel-livepatch-5.10.186-179.751, kernel-livepatch-5.10.192-182.736, kernel-livepatch-5.10.192-183.736 (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:S/C:C/I:C/A:C) | Sep 12, 2023 | Oct 6, 2023 | Feb 20, 2025 |
Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Sep 12, 2023
Added
Oct 6, 2023
Modified
Feb 20, 2025
Description
A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.
When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue().
We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.
Solutions
amazon-linux-ami-2-upgrade-bpftoolamazon-linux-ami-2-upgrade-bpftool-debuginfoamazon-linux-ami-2-upgrade-kernelamazon-linux-ami-2-upgrade-kernel-debuginfoamazon-linux-ami-2-upgrade-kernel-debuginfo-common-aarch64amazon-linux-ami-2-upgrade-kernel-debuginfo-common-x86_64amazon-linux-ami-2-upgrade-kernel-develamazon-linux-ami-2-upgrade-kernel-headersamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-320-243-544amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-320-243-544-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-322-244-536amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-322-244-536-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-322-244-539amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-322-244-539-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-322-246-539amazon-linux-ami-2-upgrade-kernel-livepatch-4-14-322-246-539-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-326-245-539amazon-linux-ami-2-upgrade-kernel-livepatch-5-10-186-179-751amazon-linux-ami-2-upgrade-kernel-livepatch-5-10-186-179-751-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-5-10-192-182-736amazon-linux-ami-2-upgrade-kernel-livepatch-5-10-192-182-736-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-5-10-192-183-736amazon-linux-ami-2-upgrade-kernel-livepatch-5-10-192-183-736-debuginfoamazon-linux-ami-2-upgrade-kernel-livepatch-5-10-196-185-743amazon-linux-ami-2-upgrade-kernel-livepatch-5-15-133-86-144amazon-linux-ami-2-upgrade-kernel-toolsamazon-linux-ami-2-upgrade-kernel-tools-debuginfoamazon-linux-ami-2-upgrade-kernel-tools-develamazon-linux-ami-2-upgrade-perfamazon-linux-ami-2-upgrade-perf-debuginfoamazon-linux-ami-2-upgrade-python-perfamazon-linux-ami-2-upgrade-python-perf-debuginfo
References
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