298 lines
15 KiB
JSON
298 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-2026-72374",
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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": "2026-08-09T03:40:39.922Z",
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"datePublished": "2026-08-15T05:56:09.182Z",
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"dateUpdated": "2026-10-16T18:55:20.697Z"
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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": "2026-08-17T05:43:27.599Z"
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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\nafs: Fix callback service message parsers to pass through -EAGAIN\n\nThe AFS filesystem client uses an rxrpc server to listen for callback\nnotifications. Each callback call type handler has a delivery function\nthat parses the incoming request stream, and this should return -EAGAIN the\nlast packet hasn't yet been seen, but all currently queued received data is\nconsumed. afs_extract_data() does this, but the -EAGAIN return is switched\nto 0 inadvertantly\n\nFix callback service message parsers to pass through -EAGAIN"
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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 - Remote RxRPC traffic to the kafs cache manager on UDP/TCP port 7001 reaches afs_deliver_cb_init_call_back_state3() and afs_deliver_cb_probe_uuid() via rxrpc incoming-call handling (afs_rx_new_call → afs_deliver_cm_op_id → afs_cm_incoming_call → deliver parsers).\nAC:L - An attacker who controls an established callback RxRPC session can reliably force -EAGAIN by fragmenting CB.InitCallBackState3 or CB.ProbeUuid DATA across multiple packets; no special memory layout, races beyond attacker pacing, or rare victim state is required.\nPR:N - No local Linux account or capabilities on the victim are needed; exploitation is driven by a remote RxRPC peer sending fragmented cache-manager callbacks after the encrypted handshake on the callback socket (minimum RXRPC_SECURITY_ENCRYPT).\nUI:N - No victim user action (mounting AFS, opening files, or clicking anything) is required at exploit time; only an active kafs client with its per-net callback listener is needed as deployment context.\nS:U - Impact is confined to kernel/AFS cache-manager state on the victim host (NULL dereference oops, panic, or callback-protocol disruption) and does not cross VM, IOMMU, or sandbox security boundaries.\nC:N - The -EAGAIN mishandling returns success before UUID unmarshalling, leaving call->request NULL; SRXAFSCB_ProbeUuid passes that pointer to memcmp(), causing a kernel fault without attacker-visible disclosure of victim data.\nI:N - The failure mode is premature parser completion and a NULL-pointer memcmp in SRXAFSCB_ProbeUuid (plus possible premature CM replies on InitCallBackState3); no arbitrary kernel write, heap corruption, or code-execution primitive is demonstrated.\nA:H - Treating -EAGAIN as success queues SRXAFSCB_ProbeUuid while call->request is still NULL, and memcmp() on that pointer causes a kernel oops/panic; a remote peer can retrigger this on demand with fragmented CB.ProbeUuid callbacks."
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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/afs/cmservice.c"
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],
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"versions": [
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{
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"version": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "26b737b3769e92493fe94c34620399d93ca231ae",
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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": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "09c67a7ded481482155b836c8c7f078a3075f8de",
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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": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "239cd337c9d047e7097f5b2ebbb41ddfb8180bc6",
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"status": "affected",
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{
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"lessThan": "5a39b145a8fb49f316e7ec1f29ba51d68095c7e4",
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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": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "772850871a2e772e26f9d93f1e9ddd413b3eeaa4",
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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": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "0acbc09d2aca0432af45cec114f20d55ceafaec4",
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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": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "f14dd036fad3d359f26f1282199cec06b3a9362b",
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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": "d001648ec7cf8b21ae9eec8b9ba4a18295adfb14",
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"lessThan": "0f36469d7ce98b362934113c550d08bb0c784231",
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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/afs/cmservice.c"
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],
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"versions": [
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{
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"version": "4.9",
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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": "4.9",
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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": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"references": [
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{
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"url": "https://git.kernel.org/stable/c/26b737b3769e92493fe94c34620399d93ca231ae"
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},
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{
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"url": "https://git.kernel.org/stable/c/09c67a7ded481482155b836c8c7f078a3075f8de"
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},
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{
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"url": "https://git.kernel.org/stable/c/239cd337c9d047e7097f5b2ebbb41ddfb8180bc6"
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},
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{
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"url": "https://git.kernel.org/stable/c/5a39b145a8fb49f316e7ec1f29ba51d68095c7e4"
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},
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{
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"url": "https://git.kernel.org/stable/c/772850871a2e772e26f9d93f1e9ddd413b3eeaa4"
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},
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{
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"url": "https://git.kernel.org/stable/c/0acbc09d2aca0432af45cec114f20d55ceafaec4"
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},
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{
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"url": "https://git.kernel.org/stable/c/f14dd036fad3d359f26f1282199cec06b3a9362b"
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},
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{
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"url": "https://git.kernel.org/stable/c/0f36469d7ce98b362934113c550d08bb0c784231"
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}
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],
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"title": "afs: Fix callback service message parsers to pass through -EAGAIN",
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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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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-72374",
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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": "yes"
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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": "2026-10-16T18:48:10.468561Z"
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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": "2026-10-16T18:55:20.697Z"
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}
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}
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]
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}
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} |