SB20260905112 - Memory leak in Linux kernel xfrm

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Main Vulnerability Database SB20260905112

SB20260905112 - Memory leak in Linux kernel xfrm

Published: September 5, 2026

Security Bulletin ID SB20260905112
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) Memory leak (CVE-ID: CVE-2026-80843)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 4.8 [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]


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

The vulnerability exists due to improper memory management in xfrm_state_construct() when constructing an XFRM state with a truncated authentication algorithm. A local user can trigger XFRM state construction using a truncated authentication algorithm to cause a denial of service.

The issue occurs when the selected authentication algorithm has no sadb_alg_id, such as cmac(aes).


Remediation

Install update from vendor's website.

References