CVE-2026-89998 Linux Kernel Device Mapper - Race Condition

Linux kernel device mapper contains a race condition caused by concurrent table load ioctls accessing dm->table_devices without proper locking, letting attackers cause invalid memory access, exploit requires concurrent ioctl calls.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Race Condition
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the race condition fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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