{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-53146","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-11-19T17:17:24.998Z","datePublished":"2024-12-24T11:28:46.883Z","dateUpdated":"2026-08-05T11:44:08.027Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:44:08.027Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Prevent a potential integer overflow\n\nIf the tag length is >= U32_MAX - 3 then the \"length + 4\" addition\ncan result in an integer overflow. Address this by splitting the\ndecoding into several steps so that decode_cb_compound4res() does\nnot have to perform arithmetic on the unsafe length value."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - The vulnerable parser is in nfsd's NFSv4 callback client (fs/nfsd/nfs4callback.c), decoding a CB_COMPOUND4res reply received over TCP from a remote NFS peer. A malicious NFS client controls every byte of that reply, either via its v4.1+ backchannel or via the v4.0 callback address it itself supplied in SETCLIENTID.\nAC:L - The attacker deterministically sets the tag length field to exactly 0xFFFFFFFC and elicits a callback on demand (async COPY→CB_OFFLOAD, blocking LOCK→CB_NOTIFY_LOCK, or delegation conflict→CB_RECALL); no race and no memory-grooming is required. The attempt can be repeated indefinitely, and each callback re-allocates the reply buffer at a different slab address, sweeping different +4 GiB targets until one faults.\nPR:N - In the standard sec=sys deployment NFS performs no cryptographic authentication — the client merely asserts a uid — so any host permitted by the export (commonly a whole subnet, VPC, or a wildcard) reaches this code with no verified credentials. EXCHANGE_ID/CREATE_SESSION require no export access at all, and the vulnerable decode runs before any CB_SEQUENCE session validation.\nUI:N - The attacker drives both halves of the exchange itself: it triggers the callback with its own ordinary NFS operations and then sends the malformed reply. No action by an administrator or any other client is needed.\nS:U - The out-of-bounds read and the resulting fault are confined to the kernel's own memory and the rpciod worker context, all within a single security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The dereference lands roughly 4 GiB away from the slab-allocated receive buffer, reading kernel memory entirely unrelated to the RPC object — this is a wild read, not one strictly bounded to a few bytes past its object. When the target is unmapped the resulting oops dumps registers, kernel addresses, and a stack trace to the log, defeating KASLR.\nI:N - The bug is purely a read; the only write is `hdr->nops`, an in-bounds store to a stack-local struct that every caller leaves unused. No kernel structure is corrupted and the attacker gains no write primitive or control-flow influence.\nA:H - A 4 GiB displacement into the direct map frequently hits an unmapped hole, faulting on a kernel address inside the rpciod workqueue — a panic under panic_on_oops, otherwise a dead RPC worker that wedges the callback machinery and leaks RPC state. The remote attacker can repeat this at will until it crashes."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfs4callback.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"745f7ce5a95e783ba62fe774325829466aec2aa8","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"90adbae9dd158da8331d9fdd32077bd1af04f553","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"3c5f545c9a1f8a1869246f6f3ae8c17289d6a841","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"842f1c27a1aef5367e535f9e85c8c3b06352151a","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"de53c5305184ca1333b87e695d329d1502d694ce","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"dde654cad08fdaac370febb161ec41eb58e9d2a2","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"084f797dbc7e52209a4ab6dbc7f0109268754eb9","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ccd3394f9a7200d6b088553bf38e688620cd27af","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"7f33b92e5b18e904a481e6e208486da43e4dc841","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/nfs4callback.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"4.19.325","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.287","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.231","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.174","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.120","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.64","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.11.11","lessThanOrEqual":"6.11.*","status":"unaffected","versionType":"semver"},{"version":"6.12.2","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13","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":"4.19.325"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.4.287"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.231"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.174"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.11.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.12.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/745f7ce5a95e783ba62fe774325829466aec2aa8"},{"url":"https://git.kernel.org/stable/c/90adbae9dd158da8331d9fdd32077bd1af04f553"},{"url":"https://git.kernel.org/stable/c/3c5f545c9a1f8a1869246f6f3ae8c17289d6a841"},{"url":"https://git.kernel.org/stable/c/842f1c27a1aef5367e535f9e85c8c3b06352151a"},{"url":"https://git.kernel.org/stable/c/de53c5305184ca1333b87e695d329d1502d694ce"},{"url":"https://git.kernel.org/stable/c/dde654cad08fdaac370febb161ec41eb58e9d2a2"},{"url":"https://git.kernel.org/stable/c/084f797dbc7e52209a4ab6dbc7f0109268754eb9"},{"url":"https://git.kernel.org/stable/c/ccd3394f9a7200d6b088553bf38e688620cd27af"},{"url":"https://git.kernel.org/stable/c/7f33b92e5b18e904a481e6e208486da43e4dc841"}],"title":"NFSD: Prevent a potential integer overflow","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-2024-53146","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T20:09:53.824541Z"}}}],"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":"2025-10-01T20:17:09.387Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T20:46:29.848Z"}}]}}