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-2025-40331",
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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": "2025-12-09T04:09:48.196Z",
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"dateUpdated": "2026-08-05T12:09:40.498Z"
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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": "2026-08-05T12:09:40.498Z"
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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: Prevent TOCTOU out-of-bounds write\n\nFor the following path not holding the sock lock,\n\n sctp_diag_dump() -> sctp_for_each_endpoint() -> sctp_ep_dump()\n\nmake sure not to exceed bounds in case the address list has grown\nbetween buffer allocation (time-of-check) and write (time-of-use)."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - Triggering requires local syscalls — a `NETLINK_SOCK_DIAG` dump request plus a concurrent `setsockopt(SCTP_SOCKOPT_BINDX_ADD)` on the attacker's own socket. A remote SCTP peer cannot drive the diag dump, so despite being in net/sctp this is the local netlink/diag surface.\nAC:L - The attacker owns both sides of the race — one thread hammers the diag dump, another calls sctp_bindx on its own endpoint — and the vulnerable window spans the entire unbounded write loop, which the attacker lengthens by pre-binding many addresses. Failed attempts are harmless and can be retried indefinitely.\nPR:L - No capability check exists anywhere on the sock_diag/inet_diag dump path (the `net_admin` flag only selects optional attributes), and sctp_do_bind only needs CAP_NET_BIND_SERVICE for ports below 1024, which the attacker avoids. Any unprivileged local user with an SCTP socket can do this, without namespaces.\nUI:N - The attacker creates the SCTP endpoint, issues the diag dump, and grows the address list entirely on its own. No victim action of any kind is involved.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The same TOCTOU in the shrink direction leaves the tail of the reserved INET_DIAG_LOCALS attribute uninitialized and copies that kernel heap data straight to userspace, and the heap overflow itself corrupts skb_shared_info (frag_list/destructor_arg), which is readily leveraged into arbitrary kernel memory disclosure.\nI:H - This is a heap out-of-bounds write with attacker-chosen length — a single bindx call can append ~8000 addresses, yielding up to ~1 MB written past the reserved region — and partially attacker-controlled content, smashing skb_shared_info and adjacent slab objects, which is a strong path to control-flow hijack and privilege escalation.\nA:H - Overwriting skb_shared_info and neighbouring allocations with sockaddr data reliably produces oopses and kernel panics on subsequent skb handling. Any unprivileged user can repeat the attack at will."
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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/diag.c"
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],
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"versions": [
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "b106a68df0650b694b254427cd9250c04500edd3",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "3006959371007fc2eae4a078f823c680fa52de1a",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "72e3fea68eac8d088e44c3dd954e843478e9240e",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "584307275b2048991b2e8984962189b6cc0a9b85",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "c9119f243d9c0da3c3b5f577a328de3e7ffd1b42",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "2fe08fcaacb7eb019fa9c81db39b2214de216677",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "89eac1e150dbd42963e13d23828cb8c4e0763196",
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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": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "95aef86ab231f047bb8085c70666059b58f53c09",
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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/diag.c"
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],
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"versions": [
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{
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"version": "4.7",
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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": "4.7",
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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": "5.4.302",
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"lessThanOrEqual": "5.4.*",
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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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"versionType": "semver"
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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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"versionType": "semver"
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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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{
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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": "4.7",
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"versionEndExcluding": "5.4.302"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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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"versionStartIncluding": "4.7",
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"versionEndExcluding": "6.17.8"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/b106a68df0650b694b254427cd9250c04500edd3"
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},
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{
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"url": "https://git.kernel.org/stable/c/3006959371007fc2eae4a078f823c680fa52de1a"
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},
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{
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"url": "https://git.kernel.org/stable/c/72e3fea68eac8d088e44c3dd954e843478e9240e"
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},
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{
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"url": "https://git.kernel.org/stable/c/584307275b2048991b2e8984962189b6cc0a9b85"
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},
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{
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"url": "https://git.kernel.org/stable/c/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42"
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},
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{
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"url": "https://git.kernel.org/stable/c/2fe08fcaacb7eb019fa9c81db39b2214de216677"
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},
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{
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"url": "https://git.kernel.org/stable/c/89eac1e150dbd42963e13d23828cb8c4e0763196"
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},
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{
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"url": "https://git.kernel.org/stable/c/95aef86ab231f047bb8085c70666059b58f53c09"
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}
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],
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"title": "sctp: Prevent TOCTOU out-of-bounds write",
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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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"timestamp": "2026-06-16T19:58:03.978750Z",
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"id": "CVE-2025-40331",
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2026-06-16T19:58:14.829Z"
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}
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}
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]
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}
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} |