{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48829","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-16T11:38:08.903Z","datePublished":"2024-07-16T11:44:13.313Z","dateUpdated":"2026-08-05T08:52:34.299Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:52:34.299Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes\n\niattr::ia_size is a loff_t, so these NFSv3 procedures must be\ncareful to deal with incoming client size values that are larger\nthan s64_max without corrupting the value.\n\nSilently capping the value results in storing a different value\nthan the client passed in which is unexpected behavior, so remove\nthe min_t() check in decode_sattr3().\n\nNote that RFC 1813 permits only the WRITE procedure to return\nNFS3ERR_FBIG. We believe that NFSv3 reference implementations\nalso return NFS3ERR_FBIG when ia_size is too large."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - The bug is in NFSD's NFSv3 XDR decode path (decode_sattr3) used by SETATTR and CREATE on the in-kernel NFS server; a remote client triggers it by sending an NFSv3 SETATTR/CREATE with a file size larger than S64_MAX over the network.\nAC:L - The attacker fully controls the sattr3 size field and can deterministically supply any u64 greater than S64_MAX; the silent min_t() capping and subsequent nfsd_setattr/notify_change path require no race or attacker-uncontrollable conditions.\nPR:N - Typical nfsd deployments accept AUTH_SYS/AUTH_NULL on reachable exports, so a network peer can obtain a filehandle and assert a writable UID without verified credentials; NFSv3 SETATTR/CREATE with ATTR_SIZE then proceeds under those unauthenticated credentials.\nUI:N - The attacker alone mounts/looks up and issues SETATTR or CREATE with an oversized size; no victim user action is required beyond nfsd already exporting a writable filesystem.\nS:U - Impact is confined to the NFS server's own kernel/filesystem state under the same OS security authority; there is no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:N - The flaw silently substitutes NFS_OFFSET_MAX for an oversized client size and applies that via setattr; it does not create an OOB/UAF read or other information-disclosure primitive.\nI:H - Silently capping oversized sizes to NFS_OFFSET_MAX causes nfsd to apply a maximum file size on filesystems whose s_maxbytes allows it (e.g. XFS with MAX_LFS_FILESIZE), corrupting the file's size attribute relative to the protocol's reject-oversized policy; when uncertain versus Low, High is required.\nA:H - Applying a S64_MAX file size via SETATTR/CREATE enables enormous sparse files and edge-case VFS/filesystem behavior at OFFSET_MAX that can deny service for the exported data and destabilize subsequent operations on that inode; when uncertain versus Low, High is required."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfs3xdr.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"72c14aed6838b5d90b4dd926b6a339b34bb02e08","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"37f2d2cd8eadddbbd9c7bda327a9393399b2f89b","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a648fdeb7c0e17177a2280344d015dba3fbe3314","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfs3xdr.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.4.295","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.220","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.24","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16.10","lessThanOrEqual":"5.16.*","status":"unaffected","versionType":"semver"},{"version":"5.17","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.4.295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.16.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/72c14aed6838b5d90b4dd926b6a339b34bb02e08"},{"url":"https://git.kernel.org/stable/c/a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3"},{"url":"https://git.kernel.org/stable/c/37f2d2cd8eadddbbd9c7bda327a9393399b2f89b"},{"url":"https://git.kernel.org/stable/c/aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0"},{"url":"https://git.kernel.org/stable/c/a648fdeb7c0e17177a2280344d015dba3fbe3314"}],"title":"NFSD: 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