289 lines
15 KiB
JSON
289 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-2026-63889",
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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": "2026-07-19T07:54:57.018Z",
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"datePublished": "2026-07-19T14:55:01.515Z",
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"dateUpdated": "2026-10-19T20:17:54.988Z"
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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": "2026-08-05T12:36:58.639Z"
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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\nscsi: scsi_transport_fc: Widen FPIN pname walker counter to u32\n\nAn adjacent Fibre Channel fabric actor that can deliver an FPIN ELS\nframe to an lpfc or qla2xxx Linux initiator can trigger a non-return in\nthe generic FC transport. This is not a local userspace or IP network\npath; the attacker must be able to inject fabric traffic, for example as\na compromised switch or fabric controller, or as a same-zone N_Port on a\nfabric that permits source spoofing.\n\nThe Link-Integrity and Peer-Congestion FPIN walkers used a u8 loop\ncounter against the 32-bit on-wire pname_count field, and did not bound\npname_count by the descriptor body already validated by the TLV walker.\nA pname_count of 256 therefore wraps the counter and keeps the loop\ncondition true indefinitely.\n\nFactor the shared pname_list[] walk into one helper, widen the counter\nto u32, and clamp pname_count against the entries that fit in the\ndescriptor body before iterating."
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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:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 8.1,
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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:A - Exploitation requires injecting a crafted FPIN ELS frame onto the Fibre Channel fabric from an adjacent fabric actor (compromised switch, fabric controller, or same-zone N_Port), not via IP or local syscalls.\nAC:L - Once on the fabric, an attacker can reliably trigger the bug by sending an FPIN with a Link-Integrity or Peer-Congestion descriptor containing pname_count=256 and a minimally valid TLV length; no race or special memory layout is required.\nPR:N - The attacker needs no privileges on the victim Linux host; FPIN ELS frames are processed without authentication once the HBA has completed fabric discovery.\nUI:N - No victim user action is required; the malicious FPIN is processed automatically when received by the HBA firmware and driver stack.\nS:U - Impact is confined to kernel availability and information disclosure on the affected host; it does not cross a security boundary such as VM escape or sandbox breakout.\nC:H - The unbounded loop reads pname_list[i] beyond the validated descriptor body via out-of-bounds kernel memory reads on every iteration, enabling information disclosure from adjacent kernel memory.\nI:N - The bug causes only counter increments in FPIN statistics structures on matched rports; there is no memory corruption or write primitive that could modify arbitrary data or achieve code execution.\nA:H - The infinite loop pins a CPU in kernel context (potentially from interrupt/DPC paths) and repeatedly acquires host_lock via fc_find_rport_by_wwpn(), causing soft lockup and complete loss of host availability."
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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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"drivers/scsi/scsi_transport_fc.c"
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],
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"versions": [
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{
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"version": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "07776b7779c9426982c1ad74aad91bd531593790",
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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": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "29f126f09e34a425b376b3646c89aa7cc18b142c",
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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": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "163bd704d7515c3df6c2e03bcba93d1db79edbff",
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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": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "ee57b89e5da9fffbe0d26647e4ff0750dacb9943",
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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": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "35461d23744175a78b6280293892cca357c22793",
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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": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "bdff76dff6ec23d6fe35812fa33e5c4ce2cdb770",
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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": "3dcfe0de5a9752e646a61f4ce513ac059960c7c3",
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"lessThan": "a9a39233ec1fc9f97ea1340a4d09bb7ec2be5153",
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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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"drivers/scsi/scsi_transport_fc.c"
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],
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"versions": [
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{
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"version": "5.11",
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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": "5.11",
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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": "5.15.210",
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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": "6.1.176",
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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": "6.6.143",
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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": "6.12.93",
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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": "6.18.35",
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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": "7.0.12",
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"lessThanOrEqual": "7.0.*",
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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",
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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": "5.11",
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"versionEndExcluding": "5.15.210"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.1.176"
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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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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.6.143"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.12.93"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.11",
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"versionEndExcluding": "6.18.35"
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{
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"versionStartIncluding": "5.11",
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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": "5.11",
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"versionEndExcluding": "7.1"
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}
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]
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}
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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/07776b7779c9426982c1ad74aad91bd531593790"
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},
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{
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"url": "https://git.kernel.org/stable/c/29f126f09e34a425b376b3646c89aa7cc18b142c"
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},
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{
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"url": "https://git.kernel.org/stable/c/163bd704d7515c3df6c2e03bcba93d1db79edbff"
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},
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{
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"url": "https://git.kernel.org/stable/c/ee57b89e5da9fffbe0d26647e4ff0750dacb9943"
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},
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{
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"url": "https://git.kernel.org/stable/c/35461d23744175a78b6280293892cca357c22793"
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},
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{
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"url": "https://git.kernel.org/stable/c/bdff76dff6ec23d6fe35812fa33e5c4ce2cdb770"
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},
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{
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"url": "https://git.kernel.org/stable/c/a9a39233ec1fc9f97ea1340a4d09bb7ec2be5153"
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}
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],
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"title": "scsi: scsi_transport_fc: Widen FPIN pname walker counter to u32",
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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-2026-63889",
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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": "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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"version": "2.0.3",
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"timestamp": "2026-10-16T15:33:03.386900Z"
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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-190",
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"description": "CWE-190 Integer Overflow or Wraparound"
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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": "2026-10-19T20:17:54.988Z"
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}
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}
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]
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}
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} |