{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43068", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.982Z", "datePublished": "2026-05-05T15:23:27.371Z", "dateUpdated": "2026-05-11T22:17:05.953Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:17:05.953Z" }, "descriptions": [ { "lang": "en", "value": "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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ext4/mballoc.c" ], "versions": [ { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "fea6b2e250ff48f10d166011b57a8516ae5438c9", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "0b84571c886719823d537f05f4f07cad6357c4b7", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "ffc0a282462d45fee5957621be5afa29752f3b6d", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "2d31a5073f86a177edf44015e0dedb0c47cfd6d8", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "9370207b36d26e45a8c8ef0500706d37036edd6b", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "1895f7904be71c48f1e6f338b28f24dabd6b8aeb", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "1c0d7c4cde38a887c6d74e0c89ddb25226943c78", "status": "affected", "versionType": "git" }, { "version": "163a203ddb36c36d4a1c942aececda0cc8d06aa7", "lessThan": "46066e3a06647c5b186cc6334409722622d05c44", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ext4/mballoc.c" ], "versions": [ { "version": "3.12", "status": "affected" }, { "version": "0", "lessThan": "3.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "3.12", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.1.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.6.131" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.12.80" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.18.21" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.19.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/fea6b2e250ff48f10d166011b57a8516ae5438c9" }, { "url": "https://git.kernel.org/stable/c/0b84571c886719823d537f05f4f07cad6357c4b7" }, { "url": "https://git.kernel.org/stable/c/ffc0a282462d45fee5957621be5afa29752f3b6d" }, { "url": "https://git.kernel.org/stable/c/2d31a5073f86a177edf44015e0dedb0c47cfd6d8" }, { "url": "https://git.kernel.org/stable/c/9370207b36d26e45a8c8ef0500706d37036edd6b" }, { "url": "https://git.kernel.org/stable/c/1895f7904be71c48f1e6f338b28f24dabd6b8aeb" }, { "url": "https://git.kernel.org/stable/c/1c0d7c4cde38a887c6d74e0c89ddb25226943c78" }, { "url": "https://git.kernel.org/stable/c/46066e3a06647c5b186cc6334409722622d05c44" } ], "title": "ext4: avoid allocate block from corrupted group in ext4_mb_find_by_goal()", "x_generator": { "engine": "bippy-1.2.0" } } } }