SB2026061089 - Use-after-free in Linux kernel lib

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Main Vulnerability Database SB2026061089

SB2026061089 - Use-after-free in Linux kernel lib

Published: June 10, 2026

Security Bulletin ID SB2026061089
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) Use-after-free (CVE-ID: CVE-2026-46280)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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/E:U/U:Clear


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

The vulnerability exists due to use-after-free in dmirror_devmem_fault() and dmirror_fops_release() in lib/test_hmm.c when handling faults on stale device private pages after file close. A local user can trigger a subsequent fault on those pages to cause a denial of service.

This issue was observed when a test failure triggered a coredump that walked VMAs and faulted in stale device private pages.


Remediation

Install update from vendor's website.

References