{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-46952", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:45:52.722Z", "datePublished": "2024-02-27T18:40:35.343Z", "dateUpdated": "2026-05-11T13:45:06.243Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:45:06.243Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: fs_context: validate UDP retrans to prevent shift out-of-bounds\n\nFix shift out-of-bounds in xprt_calc_majortimeo(). This is caused\nby a garbage timeout (retrans) mount option being passed to nfs mount,\nin this case from syzkaller.\n\nIf the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift\nvalue for a 64-bit long integer, so 'retrans' cannot be >= 64.\nIf it is >= 64, fail the mount and return an error." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/nfs/fs_context.c" ], "versions": [ { "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42", "lessThan": "96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2", "status": "affected", "versionType": "git" }, { "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42", "lessThan": "2f3380121d49e829fb73ba86240c181bc32ad897", "status": "affected", "versionType": "git" }, { "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42", "lessThan": "3d0163821c035040a46d816a42c0780f0f0a30a8", "status": "affected", "versionType": "git" }, { "version": "9954bf92c0cddd50a2a470be302e1c1ffdf21d42", "lessThan": "c09f11ef35955785f92369e25819bf0629df2e59", "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/nfs/fs_context.c" ], "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.36", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.20", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.3", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13", "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": "5.6", "versionEndExcluding": "5.10.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.11.20" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.12.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2" }, { "url": "https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897" }, { "url": "https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8" }, { "url": "https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59" } ], "title": "NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-46952", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-02-27T20:13:18.077870Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:22:02.950Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:43.053Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59", "tags": [ "x_transferred" ] } ] } ] } }