SB20261007134 - Use-after-free in Linux kernel xfrm

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Main Vulnerability Database SB20261007134

SB20261007134 - Use-after-free in Linux kernel xfrm

Published: October 7, 2026

Security Bulletin ID SB20261007134
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) Use-after-free (CVE-ID: CVE-2026-98231)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/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 use-after-free in xfrm_dev_state_free() when deferred device state flushing races with state garbage collection. A local user can trigger concurrent device state flushing and state garbage collection to cause a denial of service.

The device garbage collection list does not hold an xfrm_state reference. Both execution paths can invoke the driver callback and release the device reference.


Remediation

Install update from vendor's website.

References