Use-after-free in Linux kernel - CVE-2026-89486
Published: September 12, 2026
Vulnerability identifier: #VU149319
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89486
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to a use-after-free in the command receiver cleanup logic of _ipmi_destroy_user() when concurrently destroying an IPMI user and handling IPMB get-message commands. A local user can race command receiver destruction with RCU-protected command receiver lookups to trigger a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-89486
Install security update from vendor's repository.