{ "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-2024-40943", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-40943", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-07-12T12:25:17.813Z", "updatedAt": "2026-08-05T11:34:09.554Z", "importedAt": "2026-10-24T01:57:16.009Z", "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": "ocfs2: fix races between hole punching and AIO+DIO", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix races between hole punching and AIO+DIO\n\nAfter commit \"ocfs2: return real error code in ocfs2_dio_wr_get_block\",\nfstests/generic/300 become from always failed to sometimes failed:\n\n========================================================================\n[ 473.293420 ] run fstests generic/300\n\n[ 475.296983 ] JBD2: Ignoring recovery information on journal\n[ 475.302473 ] ocfs2: Mounting device (253,1) on (node local, slot 0) with ordered data mode.\n[ 494.290998 ] OCFS2: ERROR (device dm-1): ocfs2_change_extent_flag: Owner 5668 has an extent at cpos 78723 which can no longer be found\n[ 494.291609 ] On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted.\n[ 494.292018 ] OCFS2: File system is now read-only.\n[ 494.292224 ] (kworker/19:11,2628,19):ocfs2_mark_extent_written:5272 ERROR: status = -30\n[ 494.292602 ] (kworker/19:11,2628,19):ocfs2_dio_end_io_write:2374 ERROR: status = -3\nfio: io_u error on file /mnt/scratch/racer: Read-only file system: write offset=460849152, buflen=131072\n=========================================================================\n\nIn __blockdev_direct_IO, ocfs2_dio_wr_get_block is called to add unwritten\nextents to a list. extents are also inserted into extent tree in\nocfs2_write_begin_nolock. Then another thread call fallocate to puch a\nhole at one of the unwritten extent. The extent at cpos was removed by\nocfs2_remove_extent(). At end io worker thread, ocfs2_search_extent_list\nfound there is no such extent at the cpos.\n\n T1 T2 T3\n inode lock\n ...\n insert extents\n ...\n inode unlock\nocfs2_fallocate\n __ocfs2_change_file_space\n inode lock\n lock ip_alloc_sem\n ocfs2_remove_inode_range inode\n ocfs2_remove_btree_range\n ocfs2_remove_extent\n ^---remove the extent at cpos 78723\n ...\n unlock ip_alloc_sem\n inode unlock\n ocfs2_dio_end_io\n ocfs2_dio_end_io_write\n lock ip_alloc_sem\n ocfs2_mark_extent_written\n ocfs2_change_extent_flag\n ocfs2_search_extent_list\n ^---failed to find extent\n ...\n unlock ip_alloc_sem\n\nIn most filesystems, fallocate is not compatible with racing with AIO+DIO,\nso fix it by adding to wait for all dio before fallocate/punch_hole like\next4.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "3c26b5d21b1239e9c7fd31ba7d9b2d7bdbaa68d9" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "e8e2db1adac47970a6a9225f3858e9aa0e86287f" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "050ce8af6838c71e872e982b50d3f1bec21da40e" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "38825ff9da91d2854dcf6d9ac320a7e641e10f25" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "ea042dc2bea19d72e37c298bf65a9c341ef3fff3" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "3c361f313d696df72f9bccf058510e9ec737b9b1" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "117b9c009b72a6c2ebfd23484354dfee2d9570d2" }, { "version": "b25801038da5823bba1b5440a57ca68afc51b6bd", "status": "affected", "versionType": "git", "lessThan": "952b023f06a24b2ad6ba67304c4c84d45bea2f18" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.23", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.23" }, { "version": "4.19.317", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.279", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.162", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.95", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.35", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.9.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.9.*" }, { "version": "6.10", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }