CVE-2023-4128
Public on 2023-08-10
Modified on 2024-04-26
Description
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.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2023-08-17 | ALAS-2023-1803 | Fixed |
| Amazon Linux 1 | kernel | 2023-09-13 | ALAS-2023-1827 | Fixed |
| Amazon Linux 2 - Core | kernel | 2023-08-17 | ALAS2-2023-2206 | Fixed |
| Amazon Linux 2 - Core | kernel | 2023-09-27 | ALAS2-2023-2268 | Fixed |
| Amazon Linux 2 - Kernel-5.10 Extra | kernel | 2023-08-31 | ALAS2KERNEL-5.10-2023-039 | Fixed |
| Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2023-08-31 | ALAS2KERNEL-5.15-2023-026 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2023-08-17 | ALAS2KERNEL-5.4-2023-051 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2023-09-27 | ALAS2KERNEL-5.4-2023-054 | Fixed |
| Amazon Linux 2023 | kernel | 2023-08-31 | ALAS2023-2023-330 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |