CVE-2023-4128

Public on 2023-08-10
Modified on 2024-01-19
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 severity
Medium
CVSS v3 Base Score
6.7
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