298 lines
16 KiB
JSON
298 lines
16 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-2025-40187",
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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": "2025-04-16T07:20:57.177Z",
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"datePublished": "2025-11-12T21:56:29.504Z",
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"dateUpdated": "2026-10-15T22:02:40.120Z"
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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": "2026-08-05T12:08:25.629Z"
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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\nnet/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()\n\nIf new_asoc->peer.adaptation_ind=0 and sctp_ulpevent_make_authkey=0\nand sctp_ulpevent_make_authkey() returns 0, then the variable\nai_ev remains zero and the zero will be dereferenced\nin the sctp_ulpevent_free() function."
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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 SCTP state machine's COOKIE ECHO handler, driven entirely by chunks received from a remote peer over IP, and is reached from `sctp_rcv()` in NET_RX softirq context. Any host with a listening SCTP socket (telecom SIGTRAN/M3UA/Diameter signalling nodes are routinely inter-carrier and internet facing) is remotely reachable.\nAC:L - The attacker deterministically controls both selectable preconditions by simply omitting the Adaptation Layer Indication parameter (leaving `ai_ev` NULL) and omitting the SCTP-AUTH parameters (forcing the `sctp_ulpevent_make_authkey()` call), which are the default characteristics of a plain handshake. The only remaining factor is the GFP_ATOMIC allocation failing, which the attacker can influence by flooding the target with concurrent association attempts and traffic to exhaust atomic reserves — particularly effective on the memory-constrained embedded/telecom devices where SCTP is deployed.\nPR:N - SCTP association establishment is entirely unauthenticated; the attacker only needs to complete the standard INIT / INIT-ACK / COOKIE ECHO exchange against a listening socket, with the state cookie having been minted by the victim itself. No credentials, capabilities, or local account are involved anywhere along the path.\nUI:N - Exploitation requires nothing from any local user or administrator beyond the pre-existing condition that an SCTP service is listening. The attacker drives the entire handshake unilaterally.\nS:U - The NULL dereference faults inside the kernel handling the same network stack that received the packet; there is no crossing into another security authority such as a hypervisor, IOMMU, or sandbox boundary.\nC:N - The dereference is a read of `event->msg_flags` at a fixed low offset from NULL, which faults immediately; no data is returned to the attacker and no kernel memory contents are disclosed.\nI:N - The bug is a read fault on a NULL pointer with no write, no out-of-bounds access, and no object lifetime confusion, so no kernel data is modified and no control-flow hijack primitive is produced.\nA:H - The dereference occurs in NET_RX softirq context, producing a fatal exception in interrupt — a kernel panic and complete loss of availability, or at minimum an oops that kills the softirq path (and an immediate panic on the `panic_on_oops` configurations common in embedded and telecom deployments). The attacker can repeat the attempt indefinitely across reboots."
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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": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "1014b83778c8677f1d7a57c26dc728baa801ac62",
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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": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "7f702f85df0266ed7b5bab81ba50394c92f3c928",
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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": "dbceedc0213e75bf3e9f9f9e2f66b10699d004fe",
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"status": "affected",
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},
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{
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"version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "025419f4e216a3ae0d0cec622262e98e8078c447",
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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": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "c21f45cfa4a9526b34d76b397c9ef080668b6e73",
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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": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "d0e8f1445c19b1786759ba72a38267e1449bab7e",
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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": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "badbd79313e6591616c1b78e29a9b71efed7f035",
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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": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
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"lessThan": "2f3119686ef50319490ccaec81a575973da98815",
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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": "4.17",
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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": "4.17",
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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": "5.4.301",
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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": "5.10.246",
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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": "5.15.195",
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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": "6.1.157",
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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": "6.6.113",
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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": "6.12.54",
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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": "6.17.4",
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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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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.17",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1014b83778c8677f1d7a57c26dc728baa801ac62"
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},
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{
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"url": "https://git.kernel.org/stable/c/7f702f85df0266ed7b5bab81ba50394c92f3c928"
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},
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{
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"url": "https://git.kernel.org/stable/c/dbceedc0213e75bf3e9f9f9e2f66b10699d004fe"
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},
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{
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"url": "https://git.kernel.org/stable/c/025419f4e216a3ae0d0cec622262e98e8078c447"
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},
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{
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"url": "https://git.kernel.org/stable/c/c21f45cfa4a9526b34d76b397c9ef080668b6e73"
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},
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{
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"url": "https://git.kernel.org/stable/c/d0e8f1445c19b1786759ba72a38267e1449bab7e"
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},
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{
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"url": "https://git.kernel.org/stable/c/badbd79313e6591616c1b78e29a9b71efed7f035"
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},
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{
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"url": "https://git.kernel.org/stable/c/2f3119686ef50319490ccaec81a575973da98815"
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}
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],
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"title": "net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()",
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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-2025-40187",
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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": "2026-10-15T21:57:50.354384Z"
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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": "2026-10-15T22:02:40.120Z"
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}
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}
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]
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}
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} |