SB2026102375 - Double free in Linux kernel mlx5 core driver

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Main Vulnerability Database SB2026102375

SB2026102375 - Double free in Linux kernel mlx5 core driver

Published: October 23, 2026

Security Bulletin ID SB2026102375
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Double free (CVE-ID: CVE-2026-99079)

CWE-ID: CWE-415 - Double Free

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disrupt packet processing and potentially corrupt packet data.

The vulnerability exists due to a double free in the mlx5e driver's AF_XDP receive-buffer handling when an XDP redirect encounters a full socket RX ring and a subsequent batched refill of a legacy cyclic receive queue succeeds only partially. A remote attacker can send network traffic that triggers these conditions to cause a refill retry to release a live buffer through a stale pointer and publish the same UMEM frame twice, disrupting packet processing and potentially corrupting packet data.


Remediation

Install update from vendor's website.

References