{"id":"CVE-2026-43309","summary":"md raid: fix hang when stopping arrays with metadata through dm-raid","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd raid: fix hang when stopping arrays with metadata through dm-raid\n\nWhen using device-mapper's dm-raid target, stopping a RAID array can cause\nthe system to hang under specific conditions.\n\nThis occurs when:\n\n- A dm-raid managed device tree is suspended from top to bottom\n   (the top-level RAID device is suspended first, followed by its\n    underlying metadata and data devices)\n\n- The top-level RAID device is then removed\n\nRemoving the top-level device triggers a hang in the following sequence:\nthe dm-raid destructor calls md_stop(), which tries to flush the\nwrite-intent bitmap by writing to the metadata sub-devices. However, these\ndevices are already suspended, making them unable to complete the write-intent\noperations and causing an indefinite block.\n\nFix:\n\n- Prevent bitmap flushing when md_stop() is called from dm-raid\ndestructor context\n  and avoid a quiescing/unquescing cycle which could also cause I/O\n\n- Still allow write-intent bitmap flushing when called from dm-raid\nsuspend context\n\nThis ensures that RAID array teardown can complete successfully even when the\nunderlying devices are in a suspended state.\n\nThis second patch uses md_is_rdwr() to distinguish between suspend and\ndestructor paths as elaborated on above.","modified":"2026-11-08T02:30:23.726355455Z","published":"2026-05-08T13:11:27.595Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:3594-1","SUSE-SU-2026:3790-1","SUSE-SU-2026:3810-1","openSUSE-SU-2026:21555-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43309.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/24783dd06de870d646c25207bae186f78195f912"},{"type":"WEB","url":"https://git.kernel.org/stable/c/338378dfffbdbb8d37a18f0a0c0358812671f91e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/63054027d95200b04f3cf624faa7817e0555d56a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cefcb9297fbdb6d94b61787b4f8d84f55b741470"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43309.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43309"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0dd84b319352bb8ba64752d4e45396d8b13e6018"},{"fixed":"63054027d95200b04f3cf624faa7817e0555d56a"},{"fixed":"24783dd06de870d646c25207bae186f78195f912"},{"fixed":"338378dfffbdbb8d37a18f0a0c0358812671f91e"},{"fixed":"cefcb9297fbdb6d94b61787b4f8d84f55b741470"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.14.292"},{"fixed":"4.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.257"},{"fixed":"4.20"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.212"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.140"},{"fixed":"5.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.64"},{"fixed":"5.16"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.19.6"},{"fixed":"5.20"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1678ca35b80a94d474fdc31e2497ce5d7ed52512"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"690b5c90fd2d81fd1d2b6110fa36783232f6dce2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8e7fb19f1a744fd34e982633ced756fee0498ef7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a5a58fab556bfe618b4c9719eb85712d78c6cb10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"661c01b2181d9413c799127f13143583b69f20fd"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f42a9819ba84bed2e609a4dff56af37063dcabdc"}]}],"versions":["v4.14.336","v4.14.335","v4.14.334","v4.14.333","v4.14.332","v4.14.331","v4.14.330","v4.14.329","v4.14.328","v4.14.327","v4.14.326","v4.14.325","v4.14.324","v4.14.323","v4.14.322","v4.14.321","v4.14.320","v4.14.319","v4.14.318","v4.14.317","v4.14.316","v4.14.315","v4.14.314","v4.14.313","v4.14.312","v4.14.311","v4.14.310","v4.14.309","v4.14.308","v4.14.307","v4.14.306","v4.14.305","v4.14.304","v4.14.303","v4.14.302","v4.14.301","v4.14.300","v4.14.299","v4.14.298","v4.14.297","v4.14.296","v4.14.295","v4.14.294","v4.14.293","v4.14.292","v4.19.325","v4.19.324","v4.19.323","v4.19.322","v4.19.321","v4.19.320","v4.19.319","v4.19.318","v4.19.317","v4.19.316","v4.19.315","v4.19.314","v4.19.313","v4.19.312","v4.19.311","v4.19.310","v4.19.309","v4.19.308","v4.19.307","v4.19.306","v4.19.305","v4.19.304","v4.19.303","v4.19.302","v4.19.301","v4.19.300","v4.19.299","v4.19.298","v4.19.297","v4.19.296","v4.19.295","v4.19.294","v4.19.293","v4.19.292","v4.19.291","v4.19.290","v4.19.289","v4.19.288","v4.19.287","v4.19.286","v4.19.285","v4.19.284","v4.19.283","v4.19.282","v4.19.281","v4.19.280","v4.19.279","v4.19.278","v4.19.277","v4.19.276","v4.19.275","v4.19.274","v4.19.273","v4.19.272","v4.19.271","v4.19.270","v4.19.269","v4.19.268","v4.19.267","v4.19.266","v4.19.265","v4.19.264","v4.19.263","v4.19.262","v4.19.261","v4.19.260","v4.19.259","v4.19.258","v4.19.257","v5.4.302","v5.4.301","v5.4.300","v5.4.299","v5.4.298","v5.4.297","v5.4.296","v5.4.295","v5.4.294","v5.4.293","v5.4.292","v5.4.291","v5.4.290","v5.4.289","v5.4.288","v5.4.287","v5.4.286",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