{ "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: Fix NFSv3 SETATTR/CREATE's handling of large file sizes", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:01.577Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/37f2d2cd8eadddbbd9c7bda327a9393399b2f89b", "tags": [ "x_transferred" ] 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