What’s Vulnerable › Vulnerabilities

CVE-2026-89998: dm: fix race when loading and unloading a table

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-19

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.

Affected products

• Linux kernel: from 6.1.2 before 6.1.188; from 6.0.16 before 6.1; 6.2 — fixed in 6.1, 6.1.188, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.1, 6.1.188, 7.3. Check the vendor advisory for mitigations.

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
• https://git.kernel.org/stable/c/b02e35b81176c7d61dd441cc7a2e5c324a82444b

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