CVE-2026-89714Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's Network File System (NFS) component. When an NFSv4 mount attempt fails, the nfs4_server_common_setup() function does not properly free a memory allocation for the delegation hash table. A client that …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 7.5
none → high
— → 7.5
none → high
— → 7.5
none → high
Last analysed / modified upstream
7.5 → 5.5
high → medium
A flaw was found in the Linux kernel's Network File System (NFS) component. When an NFSv4 mount attempt fails, the nfs4_server_common_setup() function does not properly free a memory allocation for the delegation hash table. A client that persistently retries a failed mount can exploit this to cause an unbounded kernel memory leak. This can lead to system instability and a Denial of Service (DoS) due to memory exhaustion.
kernel: NFS: fix delegation_hash_table leak when nfs4_server_common_setup() fails — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-21.
Affected:
No fix planned:
Affected
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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