Double Free Affecting kernel-debug-devel-matched package, versions <0:6.12.0-211.40.1.el10_2


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-ALMALINUX10-KERNELDEBUGDEVELMATCHED-18507054
  • published2 Aug 2026
  • disclosed28 Jul 2026

Introduced: 28 Jul 2026

NewCVE-2026-52993  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 kernel-debug-devel-matched to version 0:6.12.0-211.40.1.el10_2 or higher.
This issue was patched in ALSA-2026:47017.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel-matched package and not the kernel-debug-devel-matched package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

tipc: fix double-free in tipc_buf_append()

tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a pointer to a local variable which was a copy of the caller's skb pointer.

If the skb was reallocated and validation subsequently failed, the error handling path would free the original skb pointer, which had already been freed, leading to double-free.

Fix this by checking if head now points to a newly allocated reassembled skb. If it does, reassign *headbuf for later freeing operations.

CVSS Base Scores

version 3.1