263 lines
14 KiB
JSON
263 lines
14 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-2024-57982",
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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": "2025-02-27T02:04:28.913Z",
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"datePublished": "2025-02-27T02:07:08.169Z",
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"dateUpdated": "2026-10-30T12:20:34.191Z"
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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": "2026-10-30T12:20:34.191Z"
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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: state: fix out-of-bounds read during lookup\n\nlookup and resize can run in parallel.\n\nThe xfrm_state_hash_generation seqlock ensures a retry, but the hash\nfunctions can observe a hmask value that is too large for the new hlist\narray.\n\nrehash does:\n rcu_assign_pointer(net->xfrm.state_bydst, ndst) [..]\n net->xfrm.state_hmask = nhashmask;\n\nWhile state lookup does:\n h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);\n hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {\n\nThis is only safe in case the update to state_bydst is larger than\nnet->xfrm.xfrm_state_hmask (or if the lookup function gets\nserialized via state spinlock again).\n\nFix this by prefetching state_hmask and the associated pointers.\nThe xfrm_state_hash_generation seqlock retry will ensure that the pointer\nand the hmask will be consistent.\n\nThe existing helpers, like xfrm_dst_hash(), are now unsafe for RCU side,\nadd lockdep assertions to document that they are only safe for insert\nside.\n\nxfrm_state_lookup_byaddr() uses the spinlock rather than RCU.\nAFAICS this is an oversight from back when state lookup was converted to\nRCU, this lock should be replaced with RCU in a future patch."
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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 race is reliably driven locally: XFRM netlink (`XFRM_MSG_NEWSA` to force `xfrm_hash_resize()`, `XFRM_MSG_GETSA` to drive concurrent lookups) is reachable from an unprivileged user's own network namespace, where the xfrm state hash tables are per-netns. Although the lookup is also hit by unauthenticated remote ESP/AH packets via `xfrm_input_state_lookup()`, a remote attacker cannot schedule the racing resize, so the local vector is the exploitable one.\nAC:L - The attacker controls both sides of the race — inserting SAs to schedule `xfrm_hash_resize()` on one CPU while issuing lookups with attacker-chosen spi/daddr on another — and can repeat indefinitely by creating fresh network namespaces, each yielding a new sequence of doubling resizes. syzbot reproduced this from ordinary syscalls.\nPR:L - `xfrm_user_rcv_msg()` requires `netlink_net_capable(CAP_NET_ADMIN)`, which resolves to `ns_capable(net->user_ns, CAP_NET_ADMIN)` and is therefore satisfied by any unprivileged user after `unshare -Urn`. No real root in the initial namespace is needed.\nUI:N - The attacker triggers both the hash resize and the concurrent state lookup entirely from their own threads; no victim action or cooperation is involved.\nS:U - The out-of-bounds access and any resulting corruption stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stale-table/new-mask mismatch reads up to a full table length past the allocation, and the OOB slot is dereferenced as an `hlist_node` and `container_of()`'d into a `struct xfrm_state`, so adjacent slab contents the attacker can groom become a fake-object pointer, yielding reads at attacker-influenced kernel addresses rather than a bounded few-byte leak.\nI:H - The bogus state pointer reaches `refcount_inc_not_zero(&x->refcnt)`, an increment write at an attacker-influenced address, and a fabricated `xfrm_state` returned to `xfrm_input()`/`xfrm_state_find()` is then used for IPsec processing — both usable to corrupt kernel state and pursue control-flow hijack.\nA:H - Walking a garbage hlist pointer read past the end of the hash table dereferences a wild address, producing an oops or panic; with larger page-order tables the OOB read can also fault into unmapped memory."
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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": "c2f672fc94642bae96821a393f342edcfa9794a6",
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"lessThan": "80610185e9dd2ef7c0a4818a47390a8655b3dc27",
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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": "c2f672fc94642bae96821a393f342edcfa9794a6",
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"lessThan": "b86dc510308d7a8955f3f47a4fea4bef887653e4",
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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": "c2f672fc94642bae96821a393f342edcfa9794a6",
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"lessThan": "a16871c7832ea6435abb6e0b58289ae7dcb7e4fc",
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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": "c2f672fc94642bae96821a393f342edcfa9794a6",
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"lessThan": "dd4c2a174994238d55ab54da2545543d36f4e0d0",
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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": "c2f672fc94642bae96821a393f342edcfa9794a6",
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"lessThan": "e952837f3ddb0ff726d5b582aa1aad9aa38d024d",
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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/xfrm/xfrm_state.c"
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],
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"versions": [
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{
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"version": "4.9",
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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": "4.9",
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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": "6.1.191",
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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": "6.6.120",
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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": "6.12.13",
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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": "6.13.2",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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": "4.9",
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"versionEndExcluding": "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": "4.9",
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"versionEndExcluding": "6.6.120"
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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": "4.9",
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"versionEndExcluding": "6.12.13"
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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": "4.9",
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"versionEndExcluding": "6.13.2"
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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": "4.9",
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"versionEndExcluding": "6.14"
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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/80610185e9dd2ef7c0a4818a47390a8655b3dc27"
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},
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{
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"url": "https://git.kernel.org/stable/c/b86dc510308d7a8955f3f47a4fea4bef887653e4"
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},
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{
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"url": "https://git.kernel.org/stable/c/a16871c7832ea6435abb6e0b58289ae7dcb7e4fc"
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},
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{
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"url": "https://git.kernel.org/stable/c/dd4c2a174994238d55ab54da2545543d36f4e0d0"
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},
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{
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"url": "https://git.kernel.org/stable/c/e952837f3ddb0ff726d5b582aa1aad9aa38d024d"
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}
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],
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"title": "xfrm: state: fix out-of-bounds read during lookup",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.1,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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-2024-57982",
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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": "2025-10-01T19:31:46.705139Z"
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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": "2025-10-01T19:36:43.400Z"
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}
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}
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]
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}
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} |