SB20260325131 - Missing Release of Resource after Effective Lifetime in Linux kernel xdp

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Main Vulnerability Database SB20260325131

SB20260325131 - Missing Release of Resource after Effective Lifetime in Linux kernel xdp

Published: March 25, 2026

Security Bulletin ID SB20260325131
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-23326)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper list management in the XSK (AF_XDP) subsystem when handling buffer fragments. A local user can trigger improper deletion of fragment nodes, leading to a buffer leak that results in resource exhaustion over time.

The issue arises because list_node is reused for both the xskb pool list and the buffer free list, and list_del() does not reinitialize node pointers, causing xp_free() to incorrectly skip returning buffers to the free list.


Remediation

Install update from vendor's website.

References