CVE-2026-89998

Summary

In the Linux kernel, the following vulnerability has been resolved:

dm: fix race when loading and unloading a table

If the userspace calls two concurrent table load ioctls and one of them succeeds and the other fails, there is a race condition because dm_setup_md_queue walks &md->table_devices without any lock. If the walk races with dm_table_destroy -> free_devices -> dm_put_table_device, there is access to invalid memory.

Fix this race by extending the lock over the list walk.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b02e35b81176c7d61dd441cc7a2e5c324a82444baffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 0ea6e5ad4a5817e91f11b4cc1e022e575ed2e7caaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a1af1884c960b98c621b6fe2fea1216b78c02152affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < af1f32ccf8051f4691ced11feb452b9d13561727affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 00ad6f9ed27f91925d4d3fb7aab50a60d774f998affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5380c7f6335cc6d77eb77d065105e81155c4d9d3affected
LinuxLinux0 < 6.1.188affected
LinuxLinux0 < 6.6.157affected
LinuxLinux0 < 6.12.110affected
LinuxLinux0 < 6.18.51affected
LinuxLinux0 < 7.2.5affected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References