{ "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-2026-43068", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43068", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-05-05T15:23:27.371Z", "updatedAt": "2026-05-11T22:17:05.953Z", "importedAt": "2026-10-24T01:58:08.712Z", "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": "ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()\n\nThere's issue as follows:\n...\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 206 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 2243 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): Delayed block allocation failed for inode 2239 at logical offset 0 with max blocks 1 with error 117\nEXT4-fs (mmcblk0p1): This should not happen!! Data will be lost\n\nEXT4-fs (mmcblk0p1): error count since last fsck: 1\nEXT4-fs (mmcblk0p1): initial error at time 1765597433: ext4_mb_generate_buddy:760\nEXT4-fs (mmcblk0p1): last error at time 1765597433: ext4_mb_generate_buddy:760\n...\n\nAccording to the log analysis, blocks are always requested from the\ncorrupted block group. This may happen as follows:\next4_mb_find_by_goal\n ext4_mb_load_buddy\n ext4_mb_load_buddy_gfp\n ext4_mb_init_cache\n ext4_read_block_bitmap_nowait\n ext4_wait_block_bitmap\n ext4_validate_block_bitmap\n if (!grp || EXT4_MB_GRP_BBITMAP_CORRUPT(grp))\n return -EFSCORRUPTED; // There's no logs.\n if (err)\n return err; // Will return error\next4_lock_group(ac->ac_sb, group);\n if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))) // Unreachable\n goto out;\n\nAfter commit 9008a58e5dce (\"ext4: make the bitmap read routines return\nreal error codes\") merged, Commit 163a203ddb36 (\"ext4: mark block group\nas corrupt on block bitmap error\") is no real solution for allocating\nblocks from corrupted block groups. This is because if\n'EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info)' is true, then\n'ext4_mb_load_buddy()' may return an error. This means that the block\nallocation will fail.\nTherefore, check block group if corrupted when ext4_mb_load_buddy()\nreturns error.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "fea6b2e250ff48f10d166011b57a8516ae5438c9" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "0b84571c886719823d537f05f4f07cad6357c4b7" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "ffc0a282462d45fee5957621be5afa29752f3b6d" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "2d31a5073f86a177edf44015e0dedb0c47cfd6d8" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "9370207b36d26e45a8c8ef0500706d37036edd6b" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "1895f7904be71c48f1e6f338b28f24dabd6b8aeb" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "1c0d7c4cde38a887c6d74e0c89ddb25226943c78" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "status": "affected", "versionType": "git", "lessThan": "46066e3a06647c5b186cc6334409722622d05c44" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.12", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.12" }, { "version": "5.10.253", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.203", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.168", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.131", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.80", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.21", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }