CVE-2026-72218None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure The cached-file path in nlm_lookup_file() reaches the found: label unconditionally, even when nlm_d…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure
The cached-file path in nlm_lookup_file() reaches the found: label unconditionally, even when nlm_do_fopen() fails. At that label *result and file->f_count are updated before the error is returned. The wrappers nlm3svc_lookup_file() and nlm4svc_lookup_file() then bail out of their switch without copying *result back to their caller, so the proc handler's local nlm_file pointer remains NULL and the cleanup path skips nlm_release_file(). The f_count increment is never released, and nlm_traverse_files() can no longer reap the file because its refcount never returns to zero between requests.
Short-circuit the cached path so neither *result nor f_count is touched when nlm_do_fopen() fails on a hashed nlm_file.
Linux >= e580323ac0b51ad10ec2e181d1f777479b7983e7 < 6cd84cefd8b73e85b9eda17b319bd40a670f3a38Linux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < fe3b45b56b6c3d4b6b341de27fa291005287a21cLinux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < cb3420c047957e565101585bb4f15e1a6e3de6b0Linux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < 7ce4c23e783e766507b2cef27bbf97e9ca944f1aLinux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < 84008bf1860e0ef8059a7583a1163f36b704d08aLinux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < 46d59ff421824b6483549d87f14efffbbbd1f6cbLinux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < 3a5c55a19cad62f2973be25fe96a1a9e7f618e8aLinux >= 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 < 70a38f87bed7f0694fd07988b47b2db1e10d8df3Linux >= 5.10.220 < 5.10.261Linux 5.15Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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