{"apiVersion":"1.0","identifier":"CVE-2026-74315","description":"In the Linux kernel, the following vulnerability has been resolved: lockd: Avoid hashing uninitialized bytes in nlm4svc_lookup_file() file_hash() digests the first LOCKD_FH_HASH_SIZE bytes of nfs_fh.data when bucketing nlm_files[], independent of fh.size. Commit 3de744ee4e45 (-lockd: Use xdrgen XDR functions for the NLMv4 TEST procedure-) set .pc_argzero to zero for the converted procedures and moved file-handle population into nlm4svc_lookup_file(), which copies only xdr_lock->fh.len bytes into lock->fh.data. When an NLMv4 client presents a file handle shorter than LOCKD_FH_HASH_SIZE, bytes fh.len..31 retain whatever the argument buffer held from an earlier request. The same wire handle then hashes to different buckets across calls; nlm_lookup_file() misses the existing nlm_file entry, and lock-state lookups fail. Zero only the tail bytes that file_hash() would otherwise consume. Handles of LOCKD_FH_HASH_SIZE or larger already populate every byte that file_hash() reads.","publishedAt":"2026-08-15T06:22:31","lastModifiedAt":"2026-08-17T06:19:25","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74315","cvssScore":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.0038,"riskScore":1.01,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74315","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74315","en":"https://www.redsauce.net/en/cves/CVE-2026-74315","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74315","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74315","de":"https://www.redsauce.net/de/cves/CVE-2026-74315","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74315","el":"https://www.redsauce.net/el/cves/CVE-2026-74315"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74315"}}