{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49708", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.444Z", "datePublished": "2025-02-26T02:24:26.142Z", "dateUpdated": "2026-05-23T15:22:46.811Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:22:46.811Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug_on ext4_mb_use_inode_pa\n\nHulk Robot reported a BUG_ON:\n==================================================================\nkernel BUG at fs/ext4/mballoc.c:3211!\n[...]\nRIP: 0010:ext4_mb_mark_diskspace_used.cold+0x85/0x136f\n[...]\nCall Trace:\n ext4_mb_new_blocks+0x9df/0x5d30\n ext4_ext_map_blocks+0x1803/0x4d80\n ext4_map_blocks+0x3a4/0x1a10\n ext4_writepages+0x126d/0x2c30\n do_writepages+0x7f/0x1b0\n __filemap_fdatawrite_range+0x285/0x3b0\n file_write_and_wait_range+0xb1/0x140\n ext4_sync_file+0x1aa/0xca0\n vfs_fsync_range+0xfb/0x260\n do_fsync+0x48/0xa0\n[...]\n==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\ndo_fsync\n vfs_fsync_range\n ext4_sync_file\n file_write_and_wait_range\n __filemap_fdatawrite_range\n do_writepages\n ext4_writepages\n mpage_map_and_submit_extent\n mpage_map_one_extent\n ext4_map_blocks\n ext4_mb_new_blocks\n ext4_mb_normalize_request\n >>> start + size <= ac->ac_o_ex.fe_logical\n ext4_mb_regular_allocator\n ext4_mb_simple_scan_group\n ext4_mb_use_best_found\n ext4_mb_new_preallocation\n ext4_mb_new_inode_pa\n ext4_mb_use_inode_pa\n >>> set ac->ac_b_ex.fe_len <= 0\n ext4_mb_mark_diskspace_used\n >>> BUG_ON(ac->ac_b_ex.fe_len <= 0);\n\nwe can easily reproduce this problem with the following commands:\n\t`fallocate -l100M disk`\n\t`mkfs.ext4 -b 1024 -g 256 disk`\n\t`mount disk /mnt`\n\t`fsstress -d /mnt -l 0 -n 1000 -p 1`\n\nThe size must be smaller than or equal to EXT4_BLOCKS_PER_GROUP.\nTherefore, \"start + size <= ac->ac_o_ex.fe_logical\" may occur\nwhen the size is truncated. So start should be the start position of\nthe group where ac_o_ex.fe_logical is located after alignment.\nIn addition, when the value of fe_logical or EXT4_BLOCKS_PER_GROUP\nis very large, the value calculated by start_off is more accurate." } ], "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": "fc6c2da174edd7a7b760b12c60d432d300e05cca", "lessThan": "6880fb2e64331b9fdc85d3f32b1d7e81ad8703f1", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "a37c1359714da42517dd19d36fc3c4d17edba832", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "5707d721d1819db57dba57b1d4623034fcb32047", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "a6b31616e5afe1d3972cb0682a373e50597faf5c", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "6fdaf31ad5f3d3afab744dfd9a8b0d9142aa881f", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "90f0f9d45dff0128c0fca0d2358c4153b024afa6", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "887a3e9ad4b8309a2266bce7ae749b2bf1f7a687", "status": "affected", "versionType": "git" }, { "version": "cd648b8a8fd5071d232242d5ee7ee3c0815776af", "lessThan": "a08f789d2ab5242c07e716baf9a835725046be89", "status": "affected", "versionType": "git" }, { "version": "f213db429b883a2d5403de0b1ce92fb7d7ee979e", "status": "affected", "versionType": "git" }, { "version": "98f58e05231f835dfb09359e3b5e3a886fe8f189", "status": "affected", "versionType": "git" }, { "version": "c1664e9bcf6291c0ceb8599f57c8cf493526abe6", "status": "affected", "versionType": "git" }, { "version": "37cf4ab1ba60c30ca9fd0fe3b9993b24cb87886a", "status": "affected", "versionType": "git" }, { "version": "75f37dab088eb84ff25a49e59371f01ea3f44aa7", "status": "affected", "versionType": "git" }, { "version": "8774c73cf6963310395823ed7077ea12943ea0f3", "status": "affected", "versionType": "git" }, { "version": "c4fbdc0124799f1772f4d886b7f2e1a6f881d195", "status": "affected", "versionType": "git" }, { "version": "4.9.14", "lessThan": "4.9.320", "status": "affected", "versionType": "semver" }, { "version": "3.2.89", "lessThan": "3.3", "status": "affected", "versionType": "semver" }, { "version": "3.10.107", "lessThan": "3.11", "status": "affected", "versionType": "semver" }, { "version": "3.12.72", "lessThan": "3.13", "status": "affected", "versionType": "semver" }, { "version": "3.16.44", "lessThan": "3.17", "status": "affected", "versionType": "semver" }, { "version": "4.1.40", "lessThan": "4.2", "status": "affected", "versionType": "semver" }, { "version": "4.4.53", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "4.10.2", "lessThan": "4.11", "status": "affected", "versionType": "semver" } ] }, { "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": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.320", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.285", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.249", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.200", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.124", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.49", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.6", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "4.9.14", "versionEndExcluding": "4.9.320" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "4.14.285" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "4.19.249" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.4.200" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.10.124" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.49" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.18.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2.89" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10.107" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12.72" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/6880fb2e64331b9fdc85d3f32b1d7e81ad8703f1" }, { "url": "https://git.kernel.org/stable/c/a37c1359714da42517dd19d36fc3c4d17edba832" }, { "url": "https://git.kernel.org/stable/c/5707d721d1819db57dba57b1d4623034fcb32047" }, { "url": "https://git.kernel.org/stable/c/a6b31616e5afe1d3972cb0682a373e50597faf5c" }, { "url": "https://git.kernel.org/stable/c/6fdaf31ad5f3d3afab744dfd9a8b0d9142aa881f" }, { "url": "https://git.kernel.org/stable/c/90f0f9d45dff0128c0fca0d2358c4153b024afa6" }, { "url": "https://git.kernel.org/stable/c/887a3e9ad4b8309a2266bce7ae749b2bf1f7a687" }, { "url": "https://git.kernel.org/stable/c/a08f789d2ab5242c07e716baf9a835725046be89" } ], "title": "ext4: fix bug_on ext4_mb_use_inode_pa", "x_generator": { "engine": "bippy-1.2.0" } } } }