{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80591", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.770Z", "datePublished": "2026-08-28T06:48:19.617Z", "dateUpdated": "2026-08-29T06:21:06.412Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-29T06:21:06.412Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix listxattr handling of corrupted xattr entries\n\nValidate the xattr entry before reading its fields in f2fs_listxattr().\nReturn -EFSCORRUPTED when the entry is outside the valid xattr storage\narea instead of returning a successful partial result."}], "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 flaw is reached via local listxattr/flistxattr/listxattrat syscalls through vfs_listxattr into f2fs_listxattr; f2fs is a local block filesystem (Android userdata, embedded flash) and although nfsd/ksmbd can call vfs_listxattr this is a secondary path requiring pre-existing on-disk corruption.\nAC:L - Once a crafted f2fs image with corrupted xattr entry sizes is mounted, the attacker deterministically controls the on-disk layout that makes list_for_each_xattr iterate past last_base_addr; no race, special memory layout, or rare kernel config is required beyond standard CONFIG_F2FS_FS_XATTR.\nPR:L - Planting malformed on-disk xattr metadata requires offline image crafting plus CAP_SYS_ADMIN to loop-mount (obtainable in an unprivileged user namespace) or root for raw block writes; triggering listxattr only needs normal file access on the attacker-controlled mount with no capability checks beyond LSM hooks on the syscall path.\nUI:N - In the highest-impact self-contained attack the attacker crafts a malicious f2fs image and mounts it inside their own user namespace, then calls listxattr on their own inode with no victim action such as opening a file or inserting removable media required.\nS:U - The out-of-bounds read corrupts or leaks kernel heap memory within the same kernel security domain; this is a standard local kernel memory-safety flaw, not a VM escape, container breakout, or IOMMU boundary bypass.\nC:H - Before bounds validation f2fs_listxattr reads entry->e_name_index and XATTR_NEXT_ENTRY() fields from xattr entries outside the valid storage area, causing slab out-of-bounds reads of adjacent kernel heap objects that can disclose kernel pointers and sensitive kernel data.\nI:H - Although the immediate fault is a read past bounds rather than a write, this is kernel heap memory corruption class behavior; adjacent-slab reads are routinely chained into further kernel exploitation via heap grooming for arbitrary write and code execution, so I:H applies when uncertain.\nA:H - Reading xattr entry fields beyond the kmalloc-allocated buffer can fault the kernel with a slab out-of-bounds access or oops under KASAN/hardening; f2fs_handle_error may log corruption but does not prevent the out-of-bounds read from destabilizing the system on each listxattr invocation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/xattr.c"], "versions": [{"version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "lessThan": "7dfac47e4189692f35230f3064acf2540e6d75fe", "status": "affected", "versionType": "git"}, {"version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "lessThan": "c8a10f174316e80d577e6549099b71a7a2111f3f", "status": "affected", "versionType": "git"}, {"version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "lessThan": 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{"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "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": "5.5", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.212"}, 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/xattr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7dfac47e4189692f35230f3064acf2540e6d75fe", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "c8a10f174316e80d577e6549099b71a7a2111f3f", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "dfa4891c27bccbd83d511a065721e85621f275a1", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "2770041f34b52334ea63351ffb1cc2007a9de46e", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "7dd01f7d0291583e3e5420c95c7d584e114899bd", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "ec9f79c8d5b28a928e65b67cd138c841571cf502", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "3c0dbfecd859fd02fe9008f33a83146102ccd9ba", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"lessThan": "5ef5bc304f23c3fe255d4936472378dcb74d0e94", "status": "affected", "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06", "versionType": "git"}, {"status": "affected", "version": "ae811cecbbb231f11a84acaf74baca1283b964c7", "versionType": "git"}, {"status": "affected", "version": "ed523cbd4a6594edf123dc03ec9d70ea4f793671", "versionType": "git"}, {"status": "affected", "version": "5811f24abd27a8a0791c6909c6ff803659060c84", "versionType": "git"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.181", "versionType": "semver"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.119", "versionType": "semver"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.36", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/xattr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix listxattr handling of corrupted xattr entries\n\nValidate the xattr entry before reading its fields in f2fs_listxattr().\nReturn -EFSCORRUPTED when the entry is outside the valid xattr storage\narea instead of returning a successful partial result."}], "id": "CVE-2026-80591", "lastModified": "2026-08-29T07:16:44.307", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": 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"416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec9f79c8d5b28a928e65b67cd138c841571cf502"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,7dfac47e4189692f35230f3064acf2540e6d75fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,c8a10f174316e80d577e6549099b71a7a2111f3f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,dfa4891c27bccbd83d511a065721e85621f275a1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,2770041f34b52334ea63351ffb1cc2007a9de46e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,7dd01f7d0291583e3e5420c95c7d584e114899bd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,ec9f79c8d5b28a928e65b67cd138c841571cf502)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,3c0dbfecd859fd02fe9008f33a83146102ccd9ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[688078e7f36c293dae25b338ddc9e0a2790f6e06,5ef5bc304f23c3fe255d4936472378dcb74d0e94)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "ae811cecbbb231f11a84acaf74baca1283b964c7"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "ed523cbd4a6594edf123dc03ec9d70ea4f793671"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "5811f24abd27a8a0791c6909c6ff803659060c84"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.14.181,4.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.119,4.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.36,5.5)"}}], "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": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.261,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.212,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.178,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.96,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.39,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-28T11:15:03.333514+00:00", "updated": "2026-08-29T13:00:07.118120+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119"]}