CVE-2026-53388

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53388", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.402Z", "datePublished": "2026-07-19T11:59:34.456Z", "dateUpdated": "2026-10-19T20:07:45.789Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:50:39.284Z"}, "descriptions": [{"lang": "en", "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()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/fuse/dev.c"], "versions": [{"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "7c18691e0cfda29672f79bafde8abdb7710674f6", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "5927b43a4f8d89e86930f524bf63e9c7e66f61b4", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "030fe3e9d8abdee303dd7e9e42f45082d382a407", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "46473ddccdc5065033e397d6e62c280dbcd3d9c2", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "af2892249d982a1c036ca456cc135374e68b6677", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "0223f452532d9cd8a5e87c45de828fd93c99bd25", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "e28db6ac4792d065ab32565fd9f0a2361c3d4666", "status": "affected", "versionType": "git"}, {"version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "a078484921052d0badd827fcc2770b5cfc1d4120", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/fuse/dev.c"], "versions": [{"version": "2.6.35", "status": "affected"}, {"version": "0", "lessThan": "2.6.35", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.211", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.177", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.144", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.95", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.37", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.14", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.2", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.15.211"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.1.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.6.144"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.12.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.18.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "7.0.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "7.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6"}, {"url": "https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4"}, {"url": "https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407"}, {"url": "https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2"}, {"url": "https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677"}, {"url": "https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25"}, {"url": "https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666"}, {"url": "https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120"}], "title": "fuse: re-lock request before replacing page cache folio", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53388", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:30:00.282945Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:07:45.789Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53388", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:30:00.282945Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:30:01.781Z"}}], "cna": {"title": "fuse: re-lock request before replacing page cache folio", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "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."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "7c18691e0cfda29672f79bafde8abdb7710674f6", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "5927b43a4f8d89e86930f524bf63e9c7e66f61b4", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "030fe3e9d8abdee303dd7e9e42f45082d382a407", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "46473ddccdc5065033e397d6e62c280dbcd3d9c2", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "af2892249d982a1c036ca456cc135374e68b6677", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "0223f452532d9cd8a5e87c45de828fd93c99bd25", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "e28db6ac4792d065ab32565fd9f0a2361c3d4666", "versionType": "git"}, {"status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "lessThan": "a078484921052d0badd827fcc2770b5cfc1d4120", "versionType": "git"}], "programFiles": ["fs/fuse/dev.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.35"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.35", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.211", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.177", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.144", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.95", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.37", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.14", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1.2", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/fuse/dev.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6"}, {"url": "https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4"}, {"url": "https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407"}, {"url": "https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2"}, {"url": "https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677"}, {"url": "https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25"}, {"url": "https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666"}, {"url": "https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "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()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.211", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.177", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.144", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.95", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.37", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.14", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.2", "versionStartIncluding": "2.6.35"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "2.6.35"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:50:39.284Z"}}}, "cveMetadata": {"cveId": "CVE-2026-53388", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:07:45.789Z", "dateReserved": "2026-06-09T07:44:35.402Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-19T11:59:34.456Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/fuse/dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7c18691e0cfda29672f79bafde8abdb7710674f6", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "5927b43a4f8d89e86930f524bf63e9c7e66f61b4", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "030fe3e9d8abdee303dd7e9e42f45082d382a407", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "46473ddccdc5065033e397d6e62c280dbcd3d9c2", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "af2892249d982a1c036ca456cc135374e68b6677", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "0223f452532d9cd8a5e87c45de828fd93c99bd25", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "e28db6ac4792d065ab32565fd9f0a2361c3d4666", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}, {"lessThan": "a078484921052d0badd827fcc2770b5cfc1d4120", "status": "affected", "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/fuse/dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.35"}, {"lessThan": "2.6.35", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.211", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.177", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.144", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.95", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.37", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.14", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EBBA269B-EFFD-4A82-9798-148031D55E9A", "versionEndExcluding": "5.15.211", "versionStartIncluding": "2.6.35", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "333C9E30-7FD4-46A2-94EF-C1AA1F3EE28B", "versionEndExcluding": "6.1.177", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C8AD3BC8-C843-423C-B9DB-CB52F67F578E", "versionEndExcluding": "6.6.144", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4E206B86-E0E3-4394-A93F-39F2D50A8AA8", "versionEndExcluding": "6.12.95", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E08ACB05-518A-4D61-A6C4-268D1BB6BF46", "versionEndExcluding": "6.18.37", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6241DF06-E6F3-4B61-B5A2-A60F2AE5B982", "versionEndExcluding": "7.0.14", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C18FAA06-B61A-4036-A12D-F06F5135E64B", "versionEndExcluding": "7.1.2", "versionStartIncluding": "7.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "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()."}], "id": "CVE-2026-53388", "lastModified": "2026-10-19T20:19:17.643", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53388", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:30:00.282945Z", "version": "2.0.3"}}]}, "published": "2026-07-19T12:16:49.757", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: fuse: re-lock request before replacing page cache folio", "id": "2502255", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502255"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfuse: re-lock request before replacing page cache folio\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.\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().", "A flaw was found in the Linux kernel's Filesystem in Userspace (FUSE) component. The `fuse_try_move_folio()` function, responsible for managing page cache folios, fails to re-lock a request after initially unlocking it on a successful path. This oversight allows another function, `fuse_chan_abort()`, to prematurely free critical input/output arguments (`fuse_io_args`). Consequently, subsequent operations attempting to access these freed arguments can lead to a use-after-free vulnerability, potentially allowing an attacker to cause a system crash or execute arbitrary code."], "name": "CVE-2026-53388", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53388\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53388\nhttps://lore.kernel.org/linux-cve-announce/2026071935-CVE-2026-53388-eeaf@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,7c18691e0cfda29672f79bafde8abdb7710674f6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,5927b43a4f8d89e86930f524bf63e9c7e66f61b4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,030fe3e9d8abdee303dd7e9e42f45082d382a407)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,46473ddccdc5065033e397d6e62c280dbcd3d9c2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,af2892249d982a1c036ca456cc135374e68b6677)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,0223f452532d9cd8a5e87c45de828fd93c99bd25)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,e28db6ac4792d065ab32565fd9f0a2361c3d4666)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ce534fb052928ce556639d7ecf01cbf4e01321e1,a078484921052d0badd827fcc2770b5cfc1d4120)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.35"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.35)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.211,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.177,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.144,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.95,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.37,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.14,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.2,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-21T01:00:04.321412+00:00", "updated": "2026-08-12T09:30:01.049398+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}