SB2026091757 - Improper control of a resource through its lifetime in Linux kernel loongarch kernel

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Main Vulnerability Database SB2026091757

SB2026091757 - Improper control of a resource through its lifetime in Linux kernel loongarch kernel

Published: September 17, 2026

Security Bulletin ID SB2026091757
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) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-89903)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

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 and corrupt kernel state.

The vulnerability exists due to improper restoration of a stale per-CPU base register in the LoongArch rethook trampoline when a task migrates to another CPU during rethook trampoline handling. A local user can trigger task migration during rethook trampoline handling to cause a denial of service and corrupt kernel state.


Remediation

Install update from vendor's website.

References