CVE-2023-4207

Updated: 2024-02-05 19:59:00.536134

Description:

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. When fw_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 76e42ae831991c828cffa8c37736ebfb831ad5ec.


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 In Testing 2024-02-28 08:42:29
AlmaLinux 9.2 FIPS kernel 5.14.0 7.8 HIGH In Testing 2024-02-28 08:41:29
CentOS 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-29 05:08:34
CentOS 7 ELS kernel 3.10.0 7.8 HIGH Needs Triage 2023-11-21 16:14:07
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Released 2024-01-15 13:14:21
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Released 2024-01-19 10:14:19
CloudLinux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-22 09:30:04
Oracle Linux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-09-29 05:08:34
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