Double free in Linux kernel - CVE-2026-89498
Published: September 12, 2026
Vulnerability identifier: #VU149316
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89498
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a double-free.
The vulnerability exists due to double free in the OrangeFS readdir downcall handling when processing a readdir downcall with a declared trailer size that exceeds the supplied data. A local user can send a readdir downcall with insufficient trailer data to trigger a double-free.
Affected software
Linux kernel
How to mitigate CVE-2026-89498
Install security update from vendor's repository.