SB2026102389 - Double free in Linux kernel en xsk driver

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Main Vulnerability Database SB2026102389

SB2026102389 - Double free in Linux kernel en xsk driver

Published: October 23, 2026

Security Bulletin ID SB2026102389
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Double free (CVE-ID: CVE-2026-99078)

CWE-ID: CWE-415 - Double Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to potentially cause a denial of service through kernel memory corruption.

The vulnerability exists due to a double free in the mlx5e AF_XDP receive-buffer handling code when retrying an MPWQE refill after an allocation failure on a striding receive queue. A local user can exercise this failure-and-retry path to cause xsk_buff_free() to release buffers through stale pointers after the frames have returned to the XSK pool and been reallocated, potentially corrupting kernel memory and causing a denial of service.


Remediation

Install update from vendor's website.

References