SB20260815280 - Out-of-bounds read in Linux kernel xfrm

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Main Vulnerability Database SB20260815280

SB20260815280 - Out-of-bounds read in Linux kernel xfrm

Published: August 15, 2026

Security Bulletin ID SB20260815280
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) Out-of-bounds read (CVE-ID: CVE-2026-72450)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to an out-of-bounds shift in xfrm_selector_match and address matching helpers when processing xfrm selector matching with an AF_UNSPEC selector and an oversized prefix length. A local attacker can provide a crafted selector with a mismatched family or excessive prefix length to cause a denial of service.

The issue can be triggered when an AF_UNSPEC selector is matched against an IPv4 flow while XFRM_STATE_AF_UNSPEC is set.


Remediation

Install update from vendor's website.

References