{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89998","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.780Z","datePublished":"2026-09-16T10:33:10.012Z","dateUpdated":"2026-09-17T09:29:23.946Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T09:29:23.946Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix race when loading and unloading a table\n\nIf the userspace calls two concurrent table load ioctls and one of them\nsucceeds and the other fails, there is a race condition because\ndm_setup_md_queue walks &md->table_devices without any lock. If the walk\nraces with dm_table_destroy -> free_devices -> dm_put_table_device, there\nis access to invalid memory.\n\nFix this race by extending the lock over the list walk."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The race is reached only through local DM_TABLE_LOAD ioctls on /dev/mapper/control (ctl_ioctl → table_load → dm_setup_md_queue walking md->table_devices). No network, Bluetooth, or physical-bus path loads a device-mapper table.\nAC:L - The attacker issues two concurrent table-load ioctls on a mapped device they created, owning both sides of the race: one load fails after populate_table added devices and dm_table_destroy frees them while the other walks the list. Device-mapper is a standard distro component, not a rare config.\nPR:L - ctl_ioctl requires capable(CAP_SYS_ADMIN). In the most severe reasonable deployment that capability is held by a container, CSI, or LVM/storage-stack administrator with delegated /dev/mapper/control rather than exclusive host root, matching kernel-CNA scoring of other device-mapper ioctl bugs as Low.\nUI:N - The attacker performs every step with its own ioctls (DM_DEV_CREATE then concurrent DM_TABLE_LOAD). No separate victim action such as mounting a filesystem or opening a file is required.\nS:U - The use-after-free of struct table_device stays inside the host kernel's security authority. This is standard kernel memory corruption, not a VM, IOMMU, or sandbox boundary crossing.\nC:H - dm_setup_md_queue walks md->table_devices and dereferences td->dm_dev.bdev after a concurrent dm_table_destroy has kfree'd the table_device. Reclaiming that slab object yields an arbitrary kernel read, so confidentiality is High.\nI:H - The same use-after-free lets an attacker spray a replacement object so bd_link_disk_holder writes through an attacker-controlled bdev pointer, a classic heap UAF write and control-flow hijack primitive, so integrity is High.\nA:H - Walking a freed table_device list entry or calling bd_link_disk_holder on a dangling bdev causes a kernel oops, panic, or hang, which is a complete availability impact."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm.c"],"versions":[{"version":"773bfda35c9511734d7f898e2ee73cd60d2a3f38","lessThan":"b02e35b81176c7d61dd441cc7a2e5c324a82444b","status":"affected","versionType":"git"},{"version":"1a581b72169968f4154b5793828f3bc28b258b35","lessThan":"0ea6e5ad4a5817e91f11b4cc1e022e575ed2e7ca","status":"affected","versionType":"git"},{"version":"1a581b72169968f4154b5793828f3bc28b258b35","lessThan":"a1af1884c960b98c621b6fe2fea1216b78c02152","status":"affected","versionType":"git"},{"version":"1a581b72169968f4154b5793828f3bc28b258b35","lessThan":"af1f32ccf8051f4691ced11feb452b9d13561727","status":"affected","versionType":"git"},{"version":"1a581b72169968f4154b5793828f3bc28b258b35","lessThan":"00ad6f9ed27f91925d4d3fb7aab50a60d774f998","status":"affected","versionType":"git"},{"version":"1a581b72169968f4154b5793828f3bc28b258b35","lessThan":"5380c7f6335cc6d77eb77d065105e81155c4d9d3","status":"affected","versionType":"git"},{"version":"600593707c239bb99486925d65540a5020bc1e58","status":"affected","versionType":"git"},{"version":"6.1.2","lessThan":"6.1.188","status":"affected","versionType":"semver"},{"version":"6.0.16","lessThan":"6.1","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm.c"],"versions":[{"version":"6.2","status":"affected"},{"version":"0","lessThan":"6.2","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.51","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.5","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"6.1.2","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.3-rc1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b02e35b81176c7d61dd441cc7a2e5c324a82444b"},{"url":"https://git.kernel.org/stable/c/0ea6e5ad4a5817e91f11b4cc1e022e575ed2e7ca"},{"url":"https://git.kernel.org/stable/c/a1af1884c960b98c621b6fe2fea1216b78c02152"},{"url":"https://git.kernel.org/stable/c/af1f32ccf8051f4691ced11feb452b9d13561727"},{"url":"https://git.kernel.org/stable/c/00ad6f9ed27f91925d4d3fb7aab50a60d774f998"},{"url":"https://git.kernel.org/stable/c/5380c7f6335cc6d77eb77d065105e81155c4d9d3"}],"title":"dm: fix race when loading and unloading a table","x_generator":{"engine":"bippy-1.2.0"}}}}