310 lines
17 KiB
JSON
310 lines
17 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-2026-64551",
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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": "2026-07-19T15:36:31.796Z",
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"datePublished": "2026-07-27T20:10:40.012Z",
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"dateUpdated": "2026-10-19T20:48:40.456Z"
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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": "2026-08-17T04:57:28.771Z"
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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\nsctp: validate STALE_COOKIE cause length before reading staleness\n\nWhen an ERROR chunk with a STALE_COOKIE cause is received in the\nCOOKIE_ECHOED state, sctp_sf_do_5_2_6_stale() reads the 4-byte Measure\nof Staleness that follows the cause header:\n\n\terr = (struct sctp_errhdr *)(chunk->skb->data);\n\tstale = ntohl(*(__be32 *)((u8 *)err + sizeof(*err)));\n\nerr is the first cause in the chunk, not the STALE_COOKIE cause that\ncaused the dispatch, and nothing guarantees the staleness field is\npresent. sctp_walk_errors() only requires a cause to be as long as the\n4-byte header, so for a STALE_COOKIE cause of length 4 the read runs\npast the cause, and for a minimal ERROR chunk past skb->tail. The value\nis echoed to the peer in the Cookie Preservative of the reply INIT,\nleaking uninitialized memory.\n\nsctp_sf_cookie_echoed_err() already walks to the STALE_COOKIE cause, so\ncheck its length there and pass it to sctp_sf_do_5_2_6_stale(), which\nreads that cause instead of the first one. A STALE_COOKIE cause too\nshort to hold the staleness field is discarded.\n\nThe read is reachable by any peer that can drive an association into\nCOOKIE_ECHOED, including an unprivileged process using a raw SCTP socket\nin a user and network namespace."
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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:H/I:N/A:H",
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"baseScore": 9.1,
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"baseSeverity": "CRITICAL"
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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 vulnerable code is in the SCTP receive-side state machine and is driven entirely by an attacker-crafted ERROR chunk arriving over the network; no local access is needed. Per kernel guidance, net/ stack bugs reachable via received packets (SCTP explicitly) are Network.\nAC:L - The attacker fully controls the trigger: acting as the SCTP peer it answers INIT with INIT-ACK to place the association in COOKIE_ECHOED, then sends a minimal ERROR chunk with a 4-byte STALE_COOKIE cause as the last chunk in the packet. There is no race, no memory-layout dependency, and the vtag needed is the one the victim itself advertised in its INIT.\nPR:N - SCTP association setup is unauthenticated; the only check is sctp_vtag_verify() against a tag the peer already received in the victim's INIT. The attacker needs no credentials or privileges on the target system.\nUI:N - No human user action is required — SCTP client daemons (SIGTRAN, Diameter, cluster transports) establish and retry associations automatically, and an on-path attacker can inject the ERROR into an in-progress handshake. In the local variant an unprivileged process creates both sides itself with no user involved.\nS:U - The out-of-bounds read and the resulting disclosure stay within the kernel's own security authority; no VM, sandbox, or IOMMU boundary is crossed.\nC:H - Uninitialized kernel memory past skb->tail is read and then transmitted straight back to the attacker inside the reply INIT's Cookie Preservative parameter, and the attack can be repeated indefinitely to sample recycled network-buffer memory that may contain remnants of other connections' traffic. This is a remote, unauthenticated, repeatable kernel heap disclosure oracle, matching the C:H treatment given to the sibling SCTP uninit-read CVE-2026-53225.\nI:N - The bug is a pure read; nothing in kernel memory or in the victim's association state is modified. The only affected value is a protocol field in a packet sent to the attacker itself.\nA:H - The read runs past the end of the received packet data, a memory-safety violation whose target is not proven to remain inside the skb's allocation across all receive paths (GSO/frag_list segments, UDP-encapsulated and linearized skbs), so it can fault and oops; kernel guidance and the CNA's scoring of the equivalent SCTP out-of-bounds-read bug both treat this class as A:H."
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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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"net/sctp/sm_statefuns.c"
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],
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"versions": [
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "6022da37786701df1fc5dd946a6dcba59d5473b1",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "861f884f5471632c731cbbd612a1c072e391a624",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "588706ebaf8cdb4a4161602949eba365514b1db1",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "a257b41ddfe9e327b26581ad2777f04b23ac73f5",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "08a8f2d13f703924316e9aeac863a88ef50990c7",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "ebe0a55d954fa8da383b6192edb8f763dcb002d5",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "bbd6b2ea966cf57b6ae095cf5a8dbc993cd197a0",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "1cd23ca80784223fa2204e16203f754da4e821f8",
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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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"net/sctp/sm_statefuns.c"
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],
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"versions": [
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{
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"version": "2.6.12",
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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": "2.6.12",
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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": "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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "5.10.261"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6022da37786701df1fc5dd946a6dcba59d5473b1"
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},
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{
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"url": "https://git.kernel.org/stable/c/861f884f5471632c731cbbd612a1c072e391a624"
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},
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{
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"url": "https://git.kernel.org/stable/c/588706ebaf8cdb4a4161602949eba365514b1db1"
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},
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{
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"url": "https://git.kernel.org/stable/c/a257b41ddfe9e327b26581ad2777f04b23ac73f5"
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},
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{
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"url": "https://git.kernel.org/stable/c/08a8f2d13f703924316e9aeac863a88ef50990c7"
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},
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{
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"url": "https://git.kernel.org/stable/c/ebe0a55d954fa8da383b6192edb8f763dcb002d5"
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},
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{
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"url": "https://git.kernel.org/stable/c/bbd6b2ea966cf57b6ae095cf5a8dbc993cd197a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/1cd23ca80784223fa2204e16203f754da4e821f8"
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}
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],
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"title": "sctp: validate STALE_COOKIE cause length before reading staleness",
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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-2026-64551",
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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": "2026-10-16T15:42:25.961430Z"
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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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"cweId": "CWE-125",
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"description": "CWE-125 Out-of-bounds Read"
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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": "2026-10-19T20:48:40.456Z"
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}
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}
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]
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}
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} |