CVE-2026-89857 Linux Kernel qla2xxx - Race Condition

Linux kernel qla2xxx driver contains a race condition caused by missing qpair lock when sending NVMe LS reject, letting concurrent processes corrupt request ring state, leading to duplicated or dropped commands, exploit requires concurrent access to base_qpair.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Race Condition
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/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 containing the fix for qla2xxx locking issue.

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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