{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43065", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.981Z", "datePublished": "2026-05-05T15:23:25.326Z", "dateUpdated": "2026-05-05T15:23:25.326Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-05T15:23:25.326Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: always drain queued discard work in ext4_mb_release()\n\nWhile reviewing recent ext4 patch[1], Sashiko raised the following\nconcern[2]:\n\n> If the filesystem is initially mounted with the discard option,\n> deleting files will populate sbi->s_discard_list and queue\n> s_discard_work. If it is then remounted with nodiscard, the\n> EXT4_MOUNT_DISCARD flag is cleared, but the pending s_discard_work is\n> neither cancelled nor flushed.\n\n[1] https://lore.kernel.org/r/20260319094545.19291-1-qiang.zhang@linux.dev/\n[2] https://sashiko.dev/#/patchset/20260319094545.19291-1-qiang.zhang%40linux.dev\n\nThe concern was valid, but it had nothing to do with the patch[1].\nOne of the problems with Sashiko in its current (early) form is that\nit will detect pre-existing issues and report it as a problem with the\npatch that it is reviewing.\n\nIn practice, it would be hard to hit deliberately (unless you are a\nmalicious syzkaller fuzzer), since it would involve mounting the file\nsystem with -o discard, and then deleting a large number of files,\nremounting the file system with -o nodiscard, and then immediately\nunmounting the file system before the queued discard work has a change\nto drain on its own.\n\nFix it because it's a real bug, and to avoid Sashiko from raising this\nconcern when analyzing future patches to mballoc.c."}], "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": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "e96c2354b170aaa53300c8e8fd59e41b133160f7", "status": "affected", "versionType": "git"}, {"version": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "c360e9d0def4f4ae03254a67c683103908555b75", "status": "affected", "versionType": "git"}, {"version": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "1c82f863f090ab899085bdfade073313384b514b", "status": "affected", "versionType": "git"}, {"version": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8", "status": "affected", "versionType": "git"}, {"version": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098", "status": "affected", "versionType": "git"}, {"version": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327", "status": "affected", "versionType": "git"}, {"version": "55cdd0af2bc5ffc92a2deb745627755aecd5db33", "lessThan": "9ee29d20aab228adfb02ca93f87fb53c56c2f3af", "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": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "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": "5.15", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.131"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e96c2354b170aaa53300c8e8fd59e41b133160f7"}, {"url": "https://git.kernel.org/stable/c/c360e9d0def4f4ae03254a67c683103908555b75"}, {"url": "https://git.kernel.org/stable/c/1c82f863f090ab899085bdfade073313384b514b"}, {"url": "https://git.kernel.org/stable/c/9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8"}, {"url": "https://git.kernel.org/stable/c/812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098"}, {"url": "https://git.kernel.org/stable/c/b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327"}, {"url": "https://git.kernel.org/stable/c/9ee29d20aab228adfb02ca93f87fb53c56c2f3af"}], "title": "ext4: always drain queued discard work in ext4_mb_release()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: always drain queued discard work in ext4_mb_release()\n\nWhile reviewing recent ext4 patch[1], Sashiko raised the following\nconcern[2]:\n\n> If the filesystem is initially mounted with the discard option,\n> deleting files will populate sbi->s_discard_list and queue\n> s_discard_work. If it is then remounted with nodiscard, the\n> EXT4_MOUNT_DISCARD flag is cleared, but the pending s_discard_work is\n> neither cancelled nor flushed.\n\n[1] https://lore.kernel.org/r/20260319094545.19291-1-qiang.zhang@linux.dev/\n[2] https://sashiko.dev/#/patchset/20260319094545.19291-1-qiang.zhang%40linux.dev\n\nThe concern was valid, but it had nothing to do with the patch[1].\nOne of the problems with Sashiko in its current (early) form is that\nit will detect pre-existing issues and report it as a problem with the\npatch that it is reviewing.\n\nIn practice, it would be hard to hit deliberately (unless you are a\nmalicious syzkaller fuzzer), since it would involve mounting the file\nsystem with -o discard, and then deleting a large number of files,\nremounting the file system with -o nodiscard, and then immediately\nunmounting the file system before the queued discard work has a change\nto drain on its own.\n\nFix it because it's a real bug, and to avoid Sashiko from raising this\nconcern when analyzing future patches to mballoc.c."}], "id": "CVE-2026-43065", "lastModified": "2026-05-05T16:16:15.683", "metrics": {}, "published": "2026-05-05T16:16:15.683", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1c82f863f090ab899085bdfade073313384b514b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9ee29d20aab228adfb02ca93f87fb53c56c2f3af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c360e9d0def4f4ae03254a67c683103908555b75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e96c2354b170aaa53300c8e8fd59e41b133160f7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}