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Use After Free The advisory has been revoked - it doesn't affect any version of package kernel-headers  (opens in a new tab)

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  • Snyk IDSNYK-CENTOS8-KERNELHEADERS-5806719
  • published26 Jul 2023
  • disclosed6 Jul 2023
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Introduced: 6 Jul 2023

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

Amendment

The Centos security team deemed this advisory irrelevant for Centos:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by Centos.

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.