284 lines
14 KiB
JSON
284 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-2022-49413",
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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": "2025-02-26T02:08:31.567Z",
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"datePublished": "2025-02-26T02:12:34.604Z",
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"dateUpdated": "2026-08-05T08:55:07.478Z"
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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": "2026-08-05T08:55:07.478Z"
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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\nbfq: Update cgroup information before merging bio\n\nWhen the process is migrated to a different cgroup (or in case of\nwriteback just starts submitting bios associated with a different\ncgroup) bfq_merge_bio() can operate with stale cgroup information in\nbic. Thus the bio can be merged to a request from a different cgroup or\nit can result in merging of bfqqs for different cgroups or bfqqs of\nalready dead cgroups and causing possible use-after-free issues. Fix the\nproblem by updating cgroup information in bfq_merge_bio()."
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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 bug is in BFQ's bio-merge path (bfq_bio_merge), reached only when a local process submits block I/O via write/fsync/etc. through submit_bio → blk_mq_submit_bio → blk_mq_sched_bio_merge; it is not reachable from network protocol parsers.\nAC:L - After a cgroup change (or writeback bios for a different cgroup), the bic retains stale cgroup/bfqq state and the next mergeable bio reliably uses it; an attacker who migrates within a delegated cgroup tree and issues I/O controls both sides, so success does not depend on uncontrolled conditions.\nPR:L - Any unprivileged local user can submit I/O into BFQ, and cgroup moves that desync bic state are achievable without real root via delegated cgroup subtrees (containers, systemd user sessions, Android app cgroups).\nUI:N - Exploitation requires only the attacker's own I/O and cgroup operations; no separate victim action is needed.\nS:U - Impact is confined to the host kernel's block/cgroup authority (local memory corruption / privilege escalation); it does not cross a VM, IOMMU, or other security boundary.\nC:H - The commit describes merging against bfqqs of already-dead cgroups, i.e. a use-after-free, which per scoring guidance enables attacker-controlled object reuse and arbitrary kernel read primitives.\nI:H - The same UAF on bfqq/bfqg structures enables heap spray and arbitrary write / control-flow hijacking in the kernel, not merely incorrect accounting.\nA:H - Use-after-free on freed BFQ cgroup queue structures can oops/panic the kernel (as shown by related BFQ cgroup UAF KASAN reports in the same fix series)."
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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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"block/bfq-iosched.c"
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],
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"versions": [
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{
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"version": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
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"lessThan": "da9f3025d595956410ceaab2bea01980d7775948",
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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": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
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"lessThan": "b06691af08b41dfd81052a3362514d9827b44bb1",
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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": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
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"lessThan": "e8821f45612f2e6d9adb9c6ba0fb4184f57692aa",
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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": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
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"lessThan": "d9165200c5627a2cf4408eefabdf0058bdf95e1a",
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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": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
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"lessThan": "2a1077f17169a6059992a0bbdb330e0abad1e6d9",
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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": "e21b7a0b988772e82e7147e1c659a5afe2ae003c",
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"lessThan": "ea591cd4eb270393810e7be01feb8fde6a34fbbe",
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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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"block/bfq-iosched.c"
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],
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"versions": [
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{
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"version": "4.12",
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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": "4.12",
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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": "5.4.198",
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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": "5.10.121",
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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": "5.15.46",
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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": "5.17.14",
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"lessThanOrEqual": "5.17.*",
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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": "5.18.3",
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"lessThanOrEqual": "5.18.*",
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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": "5.19",
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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": "4.12",
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"versionEndExcluding": "5.4.198"
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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": "4.12",
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"versionEndExcluding": "5.10.121"
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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": "4.12",
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"versionEndExcluding": "5.18.3"
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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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"versionEndExcluding": "5.19"
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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/da9f3025d595956410ceaab2bea01980d7775948"
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},
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{
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"url": "https://git.kernel.org/stable/c/b06691af08b41dfd81052a3362514d9827b44bb1"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8821f45612f2e6d9adb9c6ba0fb4184f57692aa"
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},
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{
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"url": "https://git.kernel.org/stable/c/d9165200c5627a2cf4408eefabdf0058bdf95e1a"
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},
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{
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"url": "https://git.kernel.org/stable/c/2a1077f17169a6059992a0bbdb330e0abad1e6d9"
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},
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{
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"url": "https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe"
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}
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],
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"title": "bfq: Update cgroup information before merging bio",
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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": 7.8,
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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:H/A:H",
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"integrityImpact": "HIGH",
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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-2022-49413",
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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": "2025-02-27T18:16:22.832240Z"
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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-416",
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"description": "CWE-416 Use After Free"
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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": "2025-02-27T18:22:33.302Z"
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}
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}
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]
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}
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} |