{"id":"CVE-2026-80591","state":"PUBLISHED","title":"f2fs: fix listxattr handling of corrupted xattr entries","description":"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.","publishedAt":"2026-08-28T06:48:19.617Z","updatedAt":"2026-08-29T06:21:06.412Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"7dfac47e4189692f35230f3064acf2540e6d75fe","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"c8a10f174316e80d577e6549099b71a7a2111f3f","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"dfa4891c27bccbd83d511a065721e85621f275a1","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"2770041f34b52334ea63351ffb1cc2007a9de46e","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"7dd01f7d0291583e3e5420c95c7d584e114899bd","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"ec9f79c8d5b28a928e65b67cd138c841571cf502","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"3c0dbfecd859fd02fe9008f33a83146102ccd9ba","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"5ef5bc304f23c3fe255d4936472378dcb74d0e94","versionType":"git"},{"version":"ae811cecbbb231f11a84acaf74baca1283b964c7","status":"affected","versionType":"git"},{"version":"ed523cbd4a6594edf123dc03ec9d70ea4f793671","status":"affected","versionType":"git"},{"version":"5811f24abd27a8a0791c6909c6ff803659060c84","status":"affected","versionType":"git"},{"version":"4.14.181","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.119","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.36","status":"affected","lessThan":"5.5","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/xattr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/xattr.c"]}],"references":["https://git.kernel.org/stable/c/7dfac47e4189692f35230f3064acf2540e6d75fe","https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f","https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1","https://git.kernel.org/stable/c/2770041f34b52334ea63351ffb1cc2007a9de46e","https://git.kernel.org/stable/c/7dd01f7d0291583e3e5420c95c7d584e114899bd","https://git.kernel.org/stable/c/ec9f79c8d5b28a928e65b67cd138c841571cf502","https://git.kernel.org/stable/c/3c0dbfecd859fd02fe9008f33a83146102ccd9ba","https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80591.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80591","state":"PUBLISHED","datePublished":"2026-08-28T06:48:19.617Z","dateUpdated":"2026-08-29T06:21:06.412Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.770Z"},"containers":{"cna":{"title":"f2fs: fix listxattr handling of corrupted xattr entries","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"7dfac47e4189692f35230f3064acf2540e6d75fe","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"c8a10f174316e80d577e6549099b71a7a2111f3f","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"dfa4891c27bccbd83d511a065721e85621f275a1","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"2770041f34b52334ea63351ffb1cc2007a9de46e","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"7dd01f7d0291583e3e5420c95c7d584e114899bd","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"ec9f79c8d5b28a928e65b67cd138c841571cf502","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"3c0dbfecd859fd02fe9008f33a83146102ccd9ba","versionType":"git"},{"version":"688078e7f36c293dae25b338ddc9e0a2790f6e06","status":"affected","lessThan":"5ef5bc304f23c3fe255d4936472378dcb74d0e94","versionType":"git"},{"version":"ae811cecbbb231f11a84acaf74baca1283b964c7","status":"affected","versionType":"git"},{"version":"ed523cbd4a6594edf123dc03ec9d70ea4f793671","status":"affected","versionType":"git"},{"version":"5811f24abd27a8a0791c6909c6ff803659060c84","status":"affected","versionType":"git"},{"version":"4.14.181","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.119","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.36","status":"affected","lessThan":"5.5","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/xattr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/xattr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7dfac47e4189692f35230f3064acf2540e6d75fe"},{"url":"https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f"},{"url":"https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1"},{"url":"https://git.kernel.org/stable/c/2770041f34b52334ea63351ffb1cc2007a9de46e"},{"url":"https://git.kernel.org/stable/c/7dd01f7d0291583e3e5420c95c7d584e114899bd"},{"url":"https://git.kernel.org/stable/c/ec9f79c8d5b28a928e65b67cd138c841571cf502"},{"url":"https://git.kernel.org/stable/c/3c0dbfecd859fd02fe9008f33a83146102ccd9ba"},{"url":"https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-29T06:21:06.412Z"},"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"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.181"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.119"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.36"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}