SB20261007114 - Use-after-free in Linux kernel arm64 kernel

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Main Vulnerability Database SB20261007114

SB20261007114 - Use-after-free in Linux kernel arm64 kernel

Published: October 7, 2026

Security Bulletin ID SB20261007114
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-2026-98249)

CWE-ID: CWE-416 - Use After Free

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 user to cause a denial of service.

The vulnerability exists due to use-after-free in swsusp_arch_suspend_exit() when restoring hypervisor stub vectors during hibernation resume without supplying the required hypervisor call arguments. A local user can trigger a hibernation resume that leaves EL2 referencing freed vector memory to cause a denial of service.

The reported hang occurs with CONFIG_PAGE_POISONING=y and page_poison=on.


Remediation

Install update from vendor's website.

References