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-2026-74512",
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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": "2026-08-15T05:44:03.909Z",
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"datePublished": "2026-08-15T12:27:33.736Z",
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"dateUpdated": "2026-10-16T19:05:51.743Z"
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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": "2026-08-19T16:38:09.879Z"
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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\naudit: fix potential use-after-free in audit_del_rule()\n\n`audit_del_rule()` destroys `e->rule.exe` via `audit_remove_mark_rule()`\nbefore unlinking the rule from RCU-visible filter lists and waiting for a\ngrace period. Concurrent readers in `audit_filter()` and\n`audit_filter_rules()` still dereference `e->rule.exe`, while the fsnotify\nmark can be freed on an independent lifetime path. This creates a\nuse-after-free window during rule deletion.\n\nFix this by unlinking the rule from the RCU-visible lists and invoking\n`synchronize_rcu()` before calling `audit_remove_mark_rule()` (and other\nrule removal helpers). This ensures that all existing RCU readers have\nexited the critical section before any underlying resources are destroyed."
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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 - Reachable only via local NETLINK_AUDIT (AUDIT_DEL_RULE) or filesystem events that autoremove AUDIT_EXE rules; concurrent UAF readers run in syscall/io_uring exit audit filtering on the local host, not from remote network input.\nAC:L - The attacker controls both sides of the race by deleting an AUDIT_EXE rule (auditctl or deleting/moving the audited executable) while driving concurrent syscall/io_uring activity to keep RCU readers in audit_filter()/audit_filter_rules().\nPR:L - Besides CAP_AUDIT_CONTROL netlink deletion, unprivileged local users can trigger audit_del_rule() via fsnotify autoremove when deleting/moving an admin-configured audited executable they can write, without init-namespace root.\nUI:N - Exploitation requires no victim interaction; the attacker schedules rule deletion and concurrent audited syscalls/io_uring exits to hit the UAF window.\nS:U - Impact is kernel heap memory corruption and local privilege escalation within the host kernel security domain, not a documented cross-VM or IOMMU boundary escape.\nC:H - Use-after-free of audit_fsnotify_mark while audit_exe_compare()/audit_mark_compare() dereference mark->ino/dev enables arbitrary kernel memory reads and info disclosure primitives.\nI:H - Freed fsnotify mark objects can be reallocated and corrupted to obtain arbitrary kernel writes, control-flow hijack, and local root code execution beyond audit rule deletion.\nA:H - Concurrent dereference of a freed audit_fsnotify_mark during audit filtering can immediately oops/panic the kernel; repeated triggering yields reliable denial of service."
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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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"kernel/auditfilter.c"
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],
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"versions": [
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{
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"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
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"lessThan": "93616c567469510b7bba55b2674e0c4523fd7e64",
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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": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
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"lessThan": "3f82927b399d7a276c0c12b6ff4424b747a0c9a7",
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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": "8ae135a8962be9d4e8a131eb18eb06cdf02a47ce",
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"status": "affected",
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},
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{
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"version": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
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"lessThan": "45bf3df5b32e5a49953e7ceabc55f7dd85380e46",
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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": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
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"lessThan": "78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf",
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"status": "affected",
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{
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"lessThan": "cae0dfed5d307b240bff71c3cf206652d1b6f215",
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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": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
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"lessThan": "5b8f46864f06d6dbacb7dcea52bc084dfd122638",
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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": "34d99af52ad40bd498ba66970579a5bc1fb1a3bc",
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"lessThan": "246df90b5f1a8a6e6abbd2f058b029558720adec",
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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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"kernel/auditfilter.c"
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],
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"versions": [
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{
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"version": "4.3",
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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": "4.3",
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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": "5.10.265",
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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": "5.15.216",
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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": "6.1.183",
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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": "6.6.151",
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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": "6.12.103",
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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": "6.18.44",
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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": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.3",
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"versionEndExcluding": "5.10.265"
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"references": [
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"url": "https://git.kernel.org/stable/c/93616c567469510b7bba55b2674e0c4523fd7e64"
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},
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{
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"url": "https://git.kernel.org/stable/c/3f82927b399d7a276c0c12b6ff4424b747a0c9a7"
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},
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{
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"url": "https://git.kernel.org/stable/c/8ae135a8962be9d4e8a131eb18eb06cdf02a47ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/45bf3df5b32e5a49953e7ceabc55f7dd85380e46"
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},
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{
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"url": "https://git.kernel.org/stable/c/78bde7e9bd36eaae1b8e8cfcd47f12a34f301dbf"
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},
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{
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"url": "https://git.kernel.org/stable/c/cae0dfed5d307b240bff71c3cf206652d1b6f215"
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},
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{
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"url": "https://git.kernel.org/stable/c/5b8f46864f06d6dbacb7dcea52bc084dfd122638"
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},
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{
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"url": "https://git.kernel.org/stable/c/246df90b5f1a8a6e6abbd2f058b029558720adec"
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}
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],
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"title": "audit: fix potential use-after-free in audit_del_rule()",
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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-2026-74512",
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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": "2026-10-16T18:58:42.622737Z"
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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": "2026-10-16T19:05:51.743Z"
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}
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}
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]
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}
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} |