{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49279","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T01:49:39.298Z","datePublished":"2025-02-26T01:56:22.051Z","dateUpdated":"2026-08-05T08:54:33.885Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:54:33.885Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: prevent integer overflow on 32 bit systems\n\nOn a 32 bit system, the \"len * sizeof(*p)\" operation can have an\ninteger overflow."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":8.2,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The bug is in xdr_stream_decode_uint32_array used by NFSD NFSv4 XDR decoding (GETATTR/READDIR/EXCHANGE_ID/SETATTR bitmaps), which processes remote NFS/RPC requests over the network.\nAC:L - An attacker can reliably trigger the overflow by sending a crafted NFSv4 COMPOUND with a bitmap length >= 0x40000000 on a 32-bit nfsd; no race or uncontrolled precondition is required.\nPR:N - The overflow occurs during XDR decode (before FH/export authorization), and common nfsd deployments accept AUTH_SYS/AUTH_NULL, so an unauthenticated network peer can reach the vulnerable decode path.\nUI:N - Exploitation requires only sending crafted NFS packets to the server; no victim user action is needed.\nS:U - Impact is confined to the host kernel/nfsd security authority; there is no VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:L - On overflow, xdr_inline_decode validates a wrapped undersized length then the copy loop reads up to array_size (typically 3) words past that region, enabling a small bounded kernel-memory read into the bitmap.\nI:N - The destination writes stay within the caller-provided bitmap array; there is no out-of-bounds write or other integrity/memory-corruption write primitive.\nA:H - Reading past the end of the XDR buffer into unmapped or invalid memory can oops/panic the kernel, and the decode path can be hit repeatedly by remote requests."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/sunrpc/xdr.h"],"versions":[{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"3a2789e8ccb4a3e2a631f6817a2d3bb98b8c4fd8","status":"affected","versionType":"git"},{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"ce1aa09cc14ed625104acc2d487bd92b9a88efe2","status":"affected","versionType":"git"},{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"7af164fa2f1abc577d357d22d83a2f3490875d7e","status":"affected","versionType":"git"},{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"303cd6173dce0a28d26526c77814eb90a41bd898","status":"affected","versionType":"git"},{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c","status":"affected","versionType":"git"},{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"e4195d27306ea468a6dc3a27af6f586709951229","status":"affected","versionType":"git"},{"version":"37c88763def8474bc0972fbd1adb0d21670104b7","lessThan":"23a9dbbe0faf124fc4c139615633b9d12a3a89ef","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/sunrpc/xdr.h"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"4.19.238","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.189","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.110","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.33","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16.19","lessThanOrEqual":"5.16.*","status":"unaffected","versionType":"semver"},{"version":"5.17.2","lessThanOrEqual":"5.17.*","status":"unaffected","versionType":"semver"},{"version":"5.18","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":"4.17","versionEndExcluding":"4.19.238"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.4.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.10.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.15.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.16.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.17.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"5.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3a2789e8ccb4a3e2a631f6817a2d3bb98b8c4fd8"},{"url":"https://git.kernel.org/stable/c/ce1aa09cc14ed625104acc2d487bd92b9a88efe2"},{"url":"https://git.kernel.org/stable/c/7af164fa2f1abc577d357d22d83a2f3490875d7e"},{"url":"https://git.kernel.org/stable/c/303cd6173dce0a28d26526c77814eb90a41bd898"},{"url":"https://git.kernel.org/stable/c/79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c"},{"url":"https://git.kernel.org/stable/c/e4195d27306ea468a6dc3a27af6f586709951229"},{"url":"https://git.kernel.org/stable/c/23a9dbbe0faf124fc4c139615633b9d12a3a89ef"}],"title":"NFSD: prevent integer overflow on 32 bit systems","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49279","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:45:26.432021Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-01T19:47:01.079Z"}}]}}