{"api_version":"1","generated_at":"2026-05-13T01:06:31+00:00","cve":"CVE-2026-43065","urls":{"html":"https://cve.report/CVE-2026-43065","api":"https://cve.report/api/cve/CVE-2026-43065.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43065","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43065"},"summary":{"title":"ext4: always drain queued discard work in ext4_mb_release()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-05 16:16:15","updated_at":"2026-05-06 13:08:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e96c2354b170aaa53300c8e8fd59e41b133160f7","name":"https://git.kernel.org/stable/c/e96c2354b170aaa53300c8e8fd59e41b133160f7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c360e9d0def4f4ae03254a67c683103908555b75","name":"https://git.kernel.org/stable/c/c360e9d0def4f4ae03254a67c683103908555b75","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8","name":"https://git.kernel.org/stable/c/9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327","name":"https://git.kernel.org/stable/c/b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c82f863f090ab899085bdfade073313384b514b","name":"https://git.kernel.org/stable/c/1c82f863f090ab899085bdfade073313384b514b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098","name":"https://git.kernel.org/stable/c/812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9ee29d20aab228adfb02ca93f87fb53c56c2f3af","name":"https://git.kernel.org/stable/c/9ee29d20aab228adfb02ca93f87fb53c56c2f3af","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43065","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43065","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 e96c2354b170aaa53300c8e8fd59e41b133160f7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 c360e9d0def4f4ae03254a67c683103908555b75 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 1c82f863f090ab899085bdfade073313384b514b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 55cdd0af2bc5ffc92a2deb745627755aecd5db33 9ee29d20aab228adfb02ca93f87fb53c56c2f3af git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.131 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ext4/mballoc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e96c2354b170aaa53300c8e8fd59e41b133160f7","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"},{"lessThan":"c360e9d0def4f4ae03254a67c683103908555b75","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"},{"lessThan":"1c82f863f090ab899085bdfade073313384b514b","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"},{"lessThan":"9b4d9dda6a71ad3425c8109d27c4c6bfb9da97b8","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"},{"lessThan":"812b6a7cd3e7f3a3e8a24db85bc6313c26cb1098","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"},{"lessThan":"b4737e26d4688b8aea88ad6ea4dbfeb6e78b0327","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"},{"lessThan":"9ee29d20aab228adfb02ca93f87fb53c56c2f3af","status":"affected","version":"55cdd0af2bc5ffc92a2deb745627755aecd5db33","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ext4/mballoc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.131","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-05-05T15:23:25.326Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43065","datePublished":"2026-05-05T15:23:25.326Z","dateReserved":"2026-05-01T14:12:55.981Z","dateUpdated":"2026-05-05T15:23:25.326Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-05 16:16:15","lastModifiedDate":"2026-05-06 13:08:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43065","Ordinal":"1","Title":"ext4: always drain queued discard work in ext4_mb_release()","CVE":"CVE-2026-43065","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43065","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ext4: always drain queued discard work in ext4_mb_release()"}]}}}