CVE-2026-53388 (GCVE-0-2026-53388)
Vulnerability from cvelistv5 – Published: 2026-07-19 11:59 – Updated: 2026-10-19 20:07
VLAI
EPSS
VEX
Title
fuse: re-lock request before replacing page cache folio
Summary
In the Linux kernel, the following vulnerability has been resolved:
fuse: re-lock request before replacing page cache folio
fuse_try_move_folio() unlocks the request on entry but does not
re-lock it on the success path. This means fuse_chan_abort() can end the
request and free the fuse_io_args (eg fuse_readpages_end()) while the
subsequent copy chain logic after fuse_try_move_folio() accesses the
fuse_io_args, leading to use-after-free issues.
Fix this by calling lock_request() before replace_page_cache_folio().
This ensures the request is locked on the success path which will
prevent the fuse_io_args from being freed while the later copying logic
runs, and also ensures that the ap->folios[i]->mapping is never null
since ap->folios[i] will always point to the newfolio after
replace_page_cache_folio().
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:30 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 7c18691e0cfda29672f79bafde8abdb7710674f6
(git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 5927b43a4f8d89e86930f524bf63e9c7e66f61b4 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 030fe3e9d8abdee303dd7e9e42f45082d382a407 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 46473ddccdc5065033e397d6e62c280dbcd3d9c2 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < af2892249d982a1c036ca456cc135374e68b6677 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 0223f452532d9cd8a5e87c45de828fd93c99bd25 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < e28db6ac4792d065ab32565fd9f0a2361c3d4666 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < a078484921052d0badd827fcc2770b5cfc1d4120 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.35
Unaffected: 0 , < 2.6.35 (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.37 , ≤ 6.18.* (semver) Unaffected: 7.0.14 , ≤ 7.0.* (semver) Unaffected: 7.1.2 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53388",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T15:30:00.282945Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-19T20:07:45.789Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"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"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.211",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.177",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.144",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.95",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.37",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.14",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.2",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "2.6.35",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003efolios[i]-\u003emapping is never null\nsince ap-\u003efolios[i] will always point to the newfolio after\nreplace_page_cache_folio()."
}
],
"metrics": [
{
"cvssV3_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",
"version": "3.1"
},
"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\u0027s 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:50:39.284Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-53388",
"datePublished": "2026-07-19T11:59:34.456Z",
"dateReserved": "2026-06-09T07:44:35.402Z",
"dateUpdated": "2026-10-19T20:07:45.789Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-53388",
"date": "2026-10-20",
"epss": "0.00133",
"percentile": "0.02513"
},
"microsoft_vex": {
"current_release_date": "2026-08-14T18:30:36.000Z",
"cve": "CVE-2026-53388",
"id": "msrc_CVE-2026-53388",
"initial_release_date": "2026-07-20T01:05:40.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "fuse: re-lock request before replacing page cache folio",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53388.json",
"version": "7"
},
"nvd": {
"cve": {
"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-\u003efolios[i]-\u003emapping is never null\nsince ap-\u003efolios[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"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-10-12T15:36:37+00:00",
"cve": "CVE-2026-53388",
"id": "CVE-2026-53388",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_affected": "275",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: fuse: re-lock request before replacing page cache folio",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53388.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-53388",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T15:30:00.282945Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-16T15:30:01.781Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"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"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.211",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.177",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.144",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.95",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.37",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.14",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.2",
"versionStartIncluding": "2.6.35",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "2.6.35",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003efolios[i]-\u003emapping is never null\nsince ap-\u003efolios[i] will always point to the newfolio after\nreplace_page_cache_folio()."
}
],
"metrics": [
{
"cvssV3_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",
"version": "3.1"
},
"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\u0027s 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:50:39.284Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-53388",
"datePublished": "2026-07-19T11:59:34.456Z",
"dateReserved": "2026-06-09T07:44:35.402Z",
"dateUpdated": "2026-10-19T20:07:45.789Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.