SB20260824207 - Use-after-free in Linux kernel net

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Main Vulnerability Database SB20260824207

SB20260824207 - Use-after-free in Linux kernel net

Published: August 24, 2026

Security Bulletin ID SB20260824207
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

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-2026-74630)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to use-after-free in in6_dev_get() and inet6_dev handling when processing IPv6 device state during concurrent device teardown. A local user can trigger network operations that race with device teardown to cause a denial of service or execute arbitrary code.

The issue arises from invalid reference acquisition after the object reference count has already reached zero, and the freed object may be accessed after the RCU read-side section ends.


Remediation

Install update from vendor's website.

References