310 lines
16 KiB
JSON
310 lines
16 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-2026-53388",
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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": "2026-06-09T07:44:35.402Z",
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"datePublished": "2026-07-19T11:59:34.456Z",
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"dateUpdated": "2026-10-19T20:07:45.789Z"
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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": "2026-08-17T04:50:39.284Z"
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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\nfuse: re-lock request before replacing page cache folio\n\nfuse_try_move_folio() unlocks the request on entry but does not\nre-lock it on the success path. This means fuse_chan_abort() can end the\nrequest and free the fuse_io_args (eg fuse_readpages_end()) while the\nsubsequent copy chain logic after fuse_try_move_folio() accesses the\nfuse_io_args, leading to use-after-free issues.\n\nFix this by calling lock_request() before replace_page_cache_folio().\nThis ensures the request is locked on the success path which will\nprevent the fuse_io_args from being freed while the later copying logic\nruns, and also ensures that the ap->folios[i]->mapping is never null\nsince ap->folios[i] will always point to the newfolio after\nreplace_page_cache_folio()."
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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 reached only through local syscalls: mounting a FUSE filesystem, reading files to trigger readpages, and the FUSE daemon writing replies to /dev/fuse via splice_write with SPLICE_F_MOVE.\nAC:L - The race is between the attacker's own splice reply and a concurrent abort they trigger (e.g., via sysfs abort or unmount); the attacker controls both threads and can retry until the window is hit.\nPR:L - Exploitation requires mounting and operating a FUSE filesystem via /dev/fuse, which needs local user privileges; on typical systems this is reachable by unprivileged users via user namespaces (CAP_SYS_ADMIN in a user namespace) without init-namespace root.\nUI:N - No victim interaction is required; the attacker mounts the filesystem, runs the FUSE daemon, and triggers the concurrent abort themselves.\nS:U - Impact is kernel memory corruption and potential local privilege escalation within the same kernel security domain, not a cross-boundary escape such as guest-to-host or sandbox breakout.\nC:H - The vulnerability is a use-after-free of fuse_io_args and associated folio pointers in kernel heap memory, which can be leveraged for arbitrary kernel memory read via heap reuse.\nI:H - Use-after-free of fuse_io_args enables heap spraying and controlled reuse of freed kernel objects, providing a path to arbitrary kernel memory write or code execution.\nA:H - The UAF and the race with folio replacement can cause kernel oops/panic, including NULL pointer dereference when fuse_readpages_end accesses a folio with a NULL mapping."
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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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"fs/fuse/dev.c"
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],
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"versions": [
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{
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"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "7c18691e0cfda29672f79bafde8abdb7710674f6",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "5927b43a4f8d89e86930f524bf63e9c7e66f61b4",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "030fe3e9d8abdee303dd7e9e42f45082d382a407",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "46473ddccdc5065033e397d6e62c280dbcd3d9c2",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "af2892249d982a1c036ca456cc135374e68b6677",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "0223f452532d9cd8a5e87c45de828fd93c99bd25",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "e28db6ac4792d065ab32565fd9f0a2361c3d4666",
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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": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
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"lessThan": "a078484921052d0badd827fcc2770b5cfc1d4120",
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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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"fs/fuse/dev.c"
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],
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"versions": [
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{
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"version": "2.6.35",
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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": "2.6.35",
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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": "5.15.211",
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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": "6.1.177",
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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": "6.6.144",
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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": "6.12.95",
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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": "6.18.37",
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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": "7.0.14",
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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": "7.1.2",
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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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{
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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": "2.6.35",
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"versionEndExcluding": "5.15.211"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6"
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},
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{
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"url": "https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4"
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},
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{
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"url": "https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407"
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},
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{
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"url": "https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2"
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},
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{
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"url": "https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677"
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},
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{
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"url": "https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25"
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},
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{
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"url": "https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666"
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},
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{
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"url": "https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120"
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}
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],
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"title": "fuse: re-lock request before replacing page cache folio",
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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-2026-53388",
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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": "2026-10-16T15:30:00.282945Z"
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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": "2026-10-19T20:07:45.789Z"
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}
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}
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]
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}
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} |