{ "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-2022-49414", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49414", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:12:35.083Z", "updatedAt": "2026-05-11T18:59:21.432Z", "importedAt": "2026-10-24T01:56:49.724Z", "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: fix race condition between ext4_write and ext4_convert_inline_data", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix race condition between ext4_write and ext4_convert_inline_data\n\nHulk Robot reported a BUG_ON:\n ==================================================================\n EXT4-fs error (device loop3): ext4_mb_generate_buddy:805: group 0,\n block bitmap and bg descriptor inconsistent: 25 vs 31513 free clusters\n kernel BUG at fs/ext4/ext4_jbd2.c:53!\n invalid opcode: 0000 [#1] SMP KASAN PTI\n CPU: 0 PID: 25371 Comm: syz-executor.3 Not tainted 5.10.0+ #1\n RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]\n RIP: 0010:__ext4_journal_stop+0x10e/0x110 fs/ext4/ext4_jbd2.c:116\n [...]\n Call Trace:\n ext4_write_inline_data_end+0x59a/0x730 fs/ext4/inline.c:795\n generic_perform_write+0x279/0x3c0 mm/filemap.c:3344\n ext4_buffered_write_iter+0x2e3/0x3d0 fs/ext4/file.c:270\n ext4_file_write_iter+0x30a/0x11c0 fs/ext4/file.c:520\n do_iter_readv_writev+0x339/0x3c0 fs/read_write.c:732\n do_iter_write+0x107/0x430 fs/read_write.c:861\n vfs_writev fs/read_write.c:934 [inline]\n do_pwritev+0x1e5/0x380 fs/read_write.c:1031\n [...]\n ==================================================================\n\nAbove issue may happen as follows:\n cpu1 cpu2\n__________________________|__________________________\ndo_pwritev\n vfs_writev\n do_iter_write\n ext4_file_write_iter\n ext4_buffered_write_iter\n generic_perform_write\n ext4_da_write_begin\n vfs_fallocate\n ext4_fallocate\n ext4_convert_inline_data\n ext4_convert_inline_data_nolock\n ext4_destroy_inline_data_nolock\n clear EXT4_STATE_MAY_INLINE_DATA\n ext4_map_blocks\n ext4_ext_map_blocks\n ext4_mb_new_blocks\n ext4_mb_regular_allocator\n ext4_mb_good_group_nolock\n ext4_mb_init_group\n ext4_mb_init_cache\n ext4_mb_generate_buddy --> error\n ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)\n ext4_restore_inline_data\n set EXT4_STATE_MAY_INLINE_DATA\n ext4_block_write_begin\n ext4_da_write_end\n ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)\n ext4_write_inline_data_end\n handle=NULL\n ext4_journal_stop(handle)\n __ext4_journal_stop\n ext4_put_nojournal(handle)\n ref_cnt = (unsigned long)handle\n BUG_ON(ref_cnt == 0) ---> BUG_ON\n\nThe lock held by ext4_convert_inline_data is xattr_sem, but the lock\nheld by generic_perform_write is i_rwsem. Therefore, the two locks can\nbe concurrent.\n\nTo solve above issue, we add inode_lock() for ext4_convert_inline_data().\nAt the same time, move ext4_convert_inline_data() in front of\next4_punch_hole(), remove similar handling from ext4_punch_hole().", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf", "status": "affected", "versionType": "git", "lessThan": "18881d7e517169193d9ef6c89c7f322e3e164277" }, { "version": "0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf", "status": "affected", "versionType": "git", "lessThan": "91f90b571f1a23f5b8a9c2b68a9aa5d6981a3c3d" }, { "version": "0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf", "status": "affected", "versionType": "git", "lessThan": "14602353b350950b551eccc6b46411aa3b12ffe2" }, { "version": "0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf", "status": "affected", "versionType": "git", "lessThan": "725e00cb7039eae291890f1bb19bc867176745f6" }, { "version": "0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf", "status": "affected", "versionType": "git", "lessThan": "ccc6639f831bee91aa8b41c8a1cdd020ecfb9f32" }, { "version": "0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf", "status": "affected", "versionType": "git", "lessThan": "f87c7a4b084afc13190cbb263538e444cb2b392a" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "5.4.207", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.132", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.46", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.17.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }