224 lines
11 KiB
JSON
224 lines
11 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-2025-39965",
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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": "2025-04-16T07:20:57.149Z",
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"datePublished": "2025-10-13T13:48:31.033Z",
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"dateUpdated": "2026-10-30T12:22:40.645Z"
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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": "2026-10-30T12:22:40.645Z"
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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\nxfrm: xfrm_alloc_spi shouldn't use 0 as SPI\n\nx->id.spi == 0 means \"no SPI assigned\", but since commit\n94f39804d891 (\"xfrm: Duplicate SPI Handling\"), we now create states\nand add them to the byspi list with this value.\n\n__xfrm_state_delete doesn't remove those states from the byspi list,\nsince they shouldn't be there, and this shows up as a UAF the next\ntime we go through the byspi list."
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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 - The vulnerability is reached through the XFRM_MSG_ALLOCSPI message on a NETLINK_XFRM socket, which requires local system access. Although the dangling byspi entry can subsequently be dereferenced by a received ESP/AH packet, creating the SPI-0 state requires the local netlink path.\nAC:L - The attacker deterministically triggers the bug by requesting min=max=0, which verify_spi_info() accepts, then deleting the state via DELSA/FLUSHSA; there is no race, no memory-layout dependency, and no non-default config beyond ubiquitous CONFIG_XFRM_USER.\nPR:L - xfrm_user_rcv_msg() gates on netlink_net_capable(skb, CAP_NET_ADMIN), which is evaluated against the net namespace's user_ns, so any unprivileged user obtains it via \"unshare -Urn\". This is Low, not High.\nUI:N - The full sequence — allocate SPI 0, delete the state, re-walk the byspi hash — is performed entirely by the attacker's own process with no victim action required.\nS:U - The freed xfrm_state and the corrupted hash list both live in the kernel's own security authority; this is standard kernel memory corruption with no VM, IOMMU, or hypervisor boundary crossed.\nC:H - The dangling xfrm_state remains in a global RCU hash and is read back and returned as a live SA, so a reclaimed object leaks adjacent heap contents and crypto/key state, and the UAF can be escalated into an arbitrary kernel read primitive.\nI:H - Walkers perform refcount_inc_not_zero on the freed object (a write to freed memory) and then use it as a live SA whose type/mode function-pointer fields the attacker can control by re-spraying the xfrm_state slab, yielding control-flow hijack and arbitrary write.\nA:H - Dereferencing the freed state during byspi traversal, hash resize, or netns teardown (WARN_ON(!hlist_empty())) reliably produces a KASAN-detected use-after-free, list corruption, and kernel panic."
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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/xfrm/xfrm_state.c"
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],
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"versions": [
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{
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"version": "3d8090bb53424432fa788fe9a49e8ceca74f0544",
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"lessThan": "0baf92d0b1590b903c1f4ead75e61715e50e8146",
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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": "2fc5b54368a1bf1d2d74b4d3b8eea5309a653e38",
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"lessThan": "9fcedabaae0096f712bbb4ccca6a8538af1cd1c8",
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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": "29e9158f91f99057dbd35db5e8674d93b38549fe",
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"lessThan": "a78e55776522373c446f18d5002a8de4b09e6bf7",
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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": "94f39804d891cffe4ce17737d295f3b195bc7299",
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"lessThan": "cd8ae32e4e4652db55bce6b9c79267d8946765a9",
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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": "fb58962aa3b9359988c7b5b15a971fd9ad5b0ecd",
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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": "c67d4e7a8f90fb6361ca89d4d5c9a28f4e935e47",
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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": "6.1.191",
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"lessThan": "6.2",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.15.11",
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"lessThan": "6.16",
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"status": "affected",
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"versionType": "semver"
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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": "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/xfrm/xfrm_state.c"
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],
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"versions": [
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{
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"version": "6.6.103",
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"lessThan": "6.6.109",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.43",
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"lessThan": "6.12.50",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.16.2",
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"lessThan": "6.16.10",
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"status": "affected",
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"versionType": "semver"
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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": "6.6.103",
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"versionEndExcluding": "6.6.109"
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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": "6.12.43",
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"versionEndExcluding": "6.12.50"
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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": "6.16.2",
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"versionEndExcluding": "6.16.10"
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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": "6.1.191"
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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": "6.15.11"
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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/0baf92d0b1590b903c1f4ead75e61715e50e8146"
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},
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{
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"url": "https://git.kernel.org/stable/c/9fcedabaae0096f712bbb4ccca6a8538af1cd1c8"
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},
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{
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"url": "https://git.kernel.org/stable/c/a78e55776522373c446f18d5002a8de4b09e6bf7"
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},
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{
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"url": "https://git.kernel.org/stable/c/cd8ae32e4e4652db55bce6b9c79267d8946765a9"
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}
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],
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"title": "xfrm: xfrm_alloc_spi shouldn't use 0 as SPI",
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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-2025-39965",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:55:18.566568Z"
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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": "2026-10-15T22:02:34.319Z"
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}
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}
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]
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}
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} |