Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-89711
Published: September 12, 2026
Vulnerability identifier: #VU149094
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89711
CWE-ID: CWE-754
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to trigger a kernel warning.
The vulnerability exists due to an incorrect warning condition in nfsd_mode_check when processing NFS client LOOKUP requests for exported NFS filesystems that lack a lookup method. A remote attacker can issue a LOOKUP request to trigger a kernel warning.
The condition can occur when reexporting an NFS filesystem.
Affected software
Linux kernel
How to mitigate CVE-2026-89711
Install security update from vendor's repository.