CVE-2023-4206

Updated: 2024-02-15 20:01:15.129295

Description:

A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to achieve local privilege escalation. When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x HIGH 7.8

Status

OS name Project name Version Score Severity Status Errata Last updated
AlmaLinux 9.2 ESU kernel 5.14.0 7.8 HIGH Released CLSA-2024:1712263970 2024-04-07 09:57:02
AlmaLinux 9.2 FIPS kernel 5.14.0 7.8 HIGH Released CLSA-2024:1712570434 2024-04-08 10:43:29
CentOS 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-29 05:08:35
CentOS 7 ELS kernel 3.10.0 7.8 HIGH Already Fixed 2024-03-16 04:43:27
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Released 2024-01-15 13:14:22
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Released 2024-01-15 13:14:22
CloudLinux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-20 11:07:58
Oracle Linux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-29 05:08:35
Ubuntu 16.04 ELS linux 4.4.0 7.8 HIGH Released 2023-09-12 05:06:17
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.8 HIGH Released 2023-09-12 03:27:28
Total: 11