{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-63814", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63814", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-07-19T12:02:14.771Z", "updatedAt": "2026-08-17T04:51:21.283Z", "importedAt": "2026-10-24T01:58:20.586Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "f2fs: validate ACL entry sizes in f2fs_acl_from_disk()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate ACL entry sizes in f2fs_acl_from_disk()\n\nf2fs_acl_count() only validates the aggregate ACL xattr length. A\nmalformed ACL can still place ACL_USER or ACL_GROUP in a slot that only\ncontains struct f2fs_acl_entry_short bytes, and f2fs_acl_from_disk()\nthen reads entry->e_id before verifying that a full entry fits.\n\nRequire a short entry before reading e_tag and e_perm, and require a\nfull entry before reading e_id for ACL_USER and ACL_GROUP. Return\n-EFSCORRUPTED from these new truncated-entry checks, while keeping the\npre-existing -EINVAL paths unchanged.\n\nValidation reproduced this kernel report:\nKASAN slab-out-of-bounds in __f2fs_get_acl+0x6fb/0x7e0\nRIP: 0033:0x7f4b835ea7aa\nThe buggy address belongs to the object at ffff888114589960 which belongs\nto the cache kmalloc-8 of size 8\nThe buggy address is located 0 bytes to the right of allocated 8-byte\nregion [ffff888114589960, ffff888114589968)\nRead of size 4\nCall trace:\n dump_stack_lvl+0x66/0xa0 (?:?)\n print_report+0xce/0x630 (?:?)\n __f2fs_get_acl+0x6fb/0x7e0 (fs/f2fs/acl.c:169)\n srso_alias_return_thunk+0x5/0xfbef5 (?:?)\n __virt_addr_valid+0x224/0x430 (?:?)\n kasan_report+0xe0/0x110 (?:?)\n __f2fs_get_acl+0x5/0x7e0 (fs/f2fs/acl.c:169)\n __get_acl+0x281/0x380 (?:?)\n vfs_get_acl+0x10b/0x190 (?:?)\n do_get_acl+0x2a/0x410 (?:?)\n do_get_acl+0x9/0x410 (?:?)\n do_getxattr+0xe8/0x260 (?:?)\n filename_getxattr+0xd1/0x140 (?:?)\n do_getname+0x2d/0x2d0 (?:?)\n path_getxattrat+0x16c/0x200 (?:?)\n lock_release+0xc8/0x290 (?:?)\n cgroup_update_frozen+0x9d/0x320 (?:?)\n lockdep_hardirqs_on_prepare+0xea/0x1a0 (?:?)\n trace_hardirqs_on+0x1a/0x170 (?:?)\n _raw_spin_unlock_irq+0x28/0x50 (?:?)\n do_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\n entry_SYSCALL_64_after_hwframe+0x77/0x7f (?:?)", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "733cd8474e6d763d75ed96f3f2b98a25480cf2b9" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "4e2a96ec7236e248e706850568e0a925fd21b588" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "442ca20c54038e2400cf28aaa944cf1de2c8e65d" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "1ddf3fd21c4c652f9cab5552515c04a166662306" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "aba4f94ac1832c7299c33e1b4fe5f87eef6dc8f1" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "ff83de56882cb8466184d322abece2589258ca56" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "5d8a39649947a4e86c8fbc682d7fc0041b8d109a" }, { "version": "af48b85b8cd3fbb12c9b6759c16db6d69c0b03da", "status": "affected", "versionType": "git", "lessThan": "c4810ada31e80cbe4011467c4f3b1e93f94134f3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "5.10.260", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.211", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.177", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.144", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.95", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.38", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }