CVE-2026-89856 Linux Kernel qla2xxx - Integer Overflow

Linux kernel qla2xxx driver contains an integer truncation vulnerability caused by improper clamping of MSI-X derived queue counts, letting attackers cause memory corruption or kernel crash, exploit requires a misconfigured or malicious hot-plugged device.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Integer Overflow
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/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 clamping MSI-X queue counts.

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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