Double Free Affecting kernel-rt-debug-modules-core package, versions *


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-CENTOS9-KERNELRTDEBUGMODULESCORE-5804358
  • published25 Jul 2023
  • disclosed21 Jul 2023

Introduced: 21 Jul 2023

CVE-2023-3609  (opens in a new tab)
CWE-415  (opens in a new tab)
First added by Snyk

How to fix?

There is no fixed version for Centos:9 kernel-rt-debug-modules-core.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules-core package and not the kernel-rt-debug-modules-core package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.

If tcf_change_indev() fails, u32_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 04c55383fa5689357bcdd2c8036725a55ed632bc.

CVSS Scores

version 3.1