CVE-2026-89998

Description

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.

References

• https://git.kernel.org/stable/c/00ad6f9ed27f91925d4d3fb7aab50a60d774f998
• https://git.kernel.org/stable/c/0ea6e5ad4a5817e91f11b4cc1e022e575ed2e7ca
• https://git.kernel.org/stable/c/5380c7f6335cc6d77eb77d065105e81155c4d9d3
• https://git.kernel.org/stable/c/a1af1884c960b98c621b6fe2fea1216b78c02152
• https://git.kernel.org/stable/c/af1f32ccf8051f4691ced11feb452b9d13561727