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Double Free The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers  (opens in a new tab)

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  • Snyk IDSNYK-RHEL8-KERNELCROSSHEADERS-6076216
  • published22 Nov 2023
  • disclosed21 Jul 2023
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Introduced: 21 Jul 2023

CVE-2023-3609  (opens in a new tab)
CWE-415  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:8.

NVD Description

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

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.