311 lines
15 KiB
JSON
311 lines
15 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-2025-40324",
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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": "2025-04-16T07:20:57.186Z",
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"datePublished": "2025-12-08T00:46:51.912Z",
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"dateUpdated": "2026-10-15T22:02:45.921Z"
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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": "2026-08-05T12:09:37.288Z"
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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 crash in nfsd4_read_release()\n\nWhen tracing is enabled, the trace_nfsd_read_done trace point\ncrashes during the pynfs read.testNoFh test."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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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 bug is in the in-kernel NFS server's NFSv4 COMPOUND processing, triggered entirely by attacker-supplied RPC data arriving on TCP port 2049. No local access is needed — a crafted COMPOUND from any host that can reach nfsd is sufficient.\nAC:L - Within the vulnerable configuration (nfsd read tracepoints enabled, the configuration CVSS directs us to score), a single well-formed `COMPOUND{READ}` with no preceding PUTFH triggers the NULL dereference deterministically — no race, no memory-layout dependency, no timing window, and the attacker fully controls the request.\nPR:N - The crash occurs before any authorization gate: no filehandle, no stateid, no session/clientid, and no export access check is reached, and AUTH_SYS verifies no credentials. The NFSv4.1 `nfserr_op_not_in_session` path (nfs4proc.c:3087-3093) fires before session establishment, making this a pre-authentication code path.\nUI:N - The attacker sends the malformed COMPOUND directly to the NFS server; no administrator or client-side action is required at exploitation time.\nS:U - The NULL dereference oops occurs in the nfsd kthread within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - `nfsd4_decode_read()` memsets the whole `struct nfsd4_read`, so `rd_rqstp`/`rd_fhp` are guaranteed NULL rather than stale pointers — the fault occurs on the first access and no data is read into the trace buffer or otherwise disclosed.\nI:N - The tracepoint's `TP_fast_assign` performs only loads from the NULL pointers; there is no out-of-bounds or use-after-free write and no control-flow hijack primitive.\nA:H - A NULL pointer dereference oops kills the nfsd kernel thread mid-compound (leaking the unreleased current_fh/save_fh references), and the request can be replayed to exhaust every nfsd thread; with panic_on_oops set it is an immediate kernel panic."
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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": "65a33135e91e6dd661ecdf1194b9d90c49ae3570",
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"lessThan": "930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "375fdd8993cecc48afa359728a6e70b280dde1c8",
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"status": "affected",
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{
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"status": "affected",
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"lessThan": "03524ccff698d4a77d096ed529073d91f5edee5d",
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"status": "affected",
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"status": "affected",
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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": "3d0dcada384af22dec764c8374a2997870ec86ae",
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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": "5.10.220",
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"lessThan": "5.10.247",
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"status": "affected",
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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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"lessThan": "5.15.197",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.24",
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"lessThan": "6.1.159",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.2.11",
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"lessThan": "6.3",
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"status": "affected",
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"versionType": "semver"
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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": "6.3",
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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": "6.3",
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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": "5.10.247",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.197",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "6.1.159",
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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": "6.6.117",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.58",
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"lessThanOrEqual": "6.12.*",
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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": "6.17.8",
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"lessThanOrEqual": "6.17.*",
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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": "6.18",
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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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"references": [
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"url": "https://git.kernel.org/stable/c/930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1"
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"url": "https://git.kernel.org/stable/c/2ac46606b2cc49e78d8e3d8f2685e79e9ba73020"
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{
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"url": "https://git.kernel.org/stable/c/03524ccff698d4a77d096ed529073d91f5edee5d"
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{
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"url": "https://git.kernel.org/stable/c/a4948875ed0599c037dc438c11891c9012721b1d"
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"url": "https://git.kernel.org/stable/c/8f244b773c63fa480c9a3bd1ae04f5272f285e89"
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{
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"url": "https://git.kernel.org/stable/c/abb1f08a2121dd270193746e43b2a9373db9ad84"
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}
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],
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"title": "NFSD: Fix crash in nfsd4_read_release()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-40324",
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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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"Technical Impact": "partial"
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],
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"timestamp": "2026-10-15T21:59:24.014444Z"
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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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}
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} |