CVE-2026-90120 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains a memory corruption vulnerability caused by unchecked get_logical_index() return value in irqchip/gic-v5 MADT IAFFID parsing, letting attackers cause out-of-bounds memory corruption, exploit requires kernel interaction with specific MADT entries.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.20% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read/Write
Impact
Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for this 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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