CVE Catalog

CVE-2026-72219

Low risk· EPSS 12%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

12th percentile - higher than 12% of all known CVEs

Summary

In the Linux kernel's lockd subsystem, when nlm_do_fopen() fails, the newly allocated nlm_file object is not freed because the error path goes to out_unlock instead of out_free. A client can repeatedly trigger nlm_do_fopen() failures, causing memory leaks. The fix routes the failure through out_free to call kfree().

Risk Assessment

Memory leak can be exploited by a client to exhaust system memory, potentially leading to denial of service and system instability.

Recommendation

Apply the Linux kernel update containing the fix for CVE-2026-72219 to prevent memory leaks associated with failed nlm_do_fopen() operations.

Other vulnerabilities in Linux kernel

See all
Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: lockd: Plug nlm_file leak when nlm_do_fopen() fails A client can repeatedly drive nlm_do_fopen() failures by presenting file handles that the underlying export rejects. After kzalloc_obj() succeeds in nlm_lookup_file(), the freshly allocated nlm_file is not yet inserted into nlm_files[]. The nlm_do_fopen() failure path jumps to out_unlock, which releases nlm_file_mutex and returns without freeing the allocation, so each failure leaks one nlm_file. Route the failure through out_free so kfree() runs before the function returns.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS