Use After Free Affecting kpatch-patch-3_10_0-1160_99_1 package, versions <0:1-2.el7


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.51% (41st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL7-KPATCHPATCH31001160991-6075237
  • published22 Nov 2023
  • disclosed6 Jul 2023

Introduced: 6 Jul 2023

CVE-2023-3776  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:7 kpatch-patch-3_10_0-1160_99_1 to version 0:1-2.el7 or higher.
This issue was patched in RHSA-2023:7419.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kpatch-patch-3_10_0-1160_99_1 package and not the kpatch-patch-3_10_0-1160_99_1 package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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

If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.

We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.

CVSS Base Scores

version 3.1