250 lines
12 KiB
JSON
250 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-53381",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-09-17T14:54:09.736Z",
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"datePublished": "2025-09-18T13:33:26.234Z",
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"dateUpdated": "2026-08-05T09:13:47.305Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:13:47.305Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix leaked reference count of nfsd4_ssc_umount_item\n\nThe reference count of nfsd4_ssc_umount_item is not decremented\non error conditions. This prevents the laundromat from unmounting\nthe vfsmount of the source file.\n\nThis patch decrements the reference count of nfsd4_ssc_umount_item\non error."
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}
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],
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"metrics": [
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{
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The flaw is in nfsd's NFSv4.2 OP_COPY handler (nfsd4_copy), reached by sending a COMPOUND over TCP/2049 to the in-kernel NFS server; no local access is required.\nAC:L - The attacker controls the trigger by issuing concurrent async inter-server COPY requests that exhaust kthread/memory resources so setup succeeds then out_err runs, yielding a deterministic per-failure nsui_refcnt leak with no race outside attacker control.\nPR:N - Under AUTH_SYS (default for typical NFS deployments) the server verifies no secret; EXCHANGE_ID/CREATE_SESSION/OPEN succeed for any host allowed by the export, so no server-verified privileges are required.\nUI:N - The attacker's own NFS client issues the COPY compounds directly; no administrator or other user action on the server is required.\nS:U - The leaked nfsd4_ssc_umount_item/vfsmount references remain within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - A reference-count leak neither reads out-of-bounds nor exposes kernel memory to the client; COPY replies are unchanged and no freed or uninitialized data is disclosed.\nI:N - No out-of-bounds write or object corruption occurs—the nsui_refcnt merely stays elevated—so there is no write primitive or control-flow hijack.\nA:H - Each failed async inter-COPY permanently pins the source vfsmount (and associated NFS client state) because the laundromat skips entries with refcnt>1, and the leak is repeatable without bound by a remote client until kernel mounts/memory are exhausted."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/nfsd/nfs4proc.c"
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],
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"versions": [
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{
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"version": "a4bc287943f5695209ff36bdc89f17b48d68fae7",
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"lessThan": "2da50149981d05955e51c28e982e9ac29bd73417",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
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"lessThan": "80a15dc4a0214b55ca42675bb0bb2a8d857eb1d0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
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"lessThan": "9f0df37520a27ad99eaacf38418b3d2bb5023105",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
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"lessThan": "6c3c05402547aaca3edb23327b50f01a881831b9",
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"status": "affected",
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},
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{
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"version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
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"lessThan": "34e8f9ec4c9ac235f917747b23a200a5e0ec857b",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/nfsd/nfs4proc.c"
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],
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"versions": [
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{
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"version": "5.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.154",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.16",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.2.3",
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"lessThanOrEqual": "6.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "5.15.154"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.1.16"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.2.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2da50149981d05955e51c28e982e9ac29bd73417"
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},
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{
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"url": "https://git.kernel.org/stable/c/80a15dc4a0214b55ca42675bb0bb2a8d857eb1d0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f0df37520a27ad99eaacf38418b3d2bb5023105"
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},
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{
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"url": "https://git.kernel.org/stable/c/6c3c05402547aaca3edb23327b50f01a881831b9"
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},
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{
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"url": "https://git.kernel.org/stable/c/34e8f9ec4c9ac235f917747b23a200a5e0ec857b"
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}
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],
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"title": "NFSD: fix leaked reference count of nfsd4_ssc_umount_item",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2023-53381",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-01-14T18:56:23.125939Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"description": "CWE-noinfo Not enough information"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-01-14T19:03:04.270Z"
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}
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}
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]
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}
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} |