CVE-2026-92522 ACPI: processor: validate MADT IOAPIC entry bounds
An attacker with local access can trigger memory corruption in the Linux kernel via malformed ACPI MADT IOAPIC entries, potentially leading to code execution or system crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92522?
CVE-2026-92522 is a high-severity memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ACPI: processor: validate MADT IOAPIC entry bounds
The IOAPIC hotplug lookup parses both MADT and _MAT records directly. The MADT walk previously used a subtable's declared length to advance the cursor after only locating a generic header. The _MAT path likewise passed a generic header to the IOAPIC helper.
Validate that a current record has a complete generic header, that its declared length is contained in the available record range, and that a typed IOAPIC record contains the full fixed IOAPIC body before reading its fields. Use the same relation for both MADT and _MAT provider paths.
Which versions are affected by CVE-2026-92522?
How do I fix CVE-2026-92522?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-92522 being exploited?
There is no known exploitation of CVE-2026-92522 in the wild and no public exploit code.
Sources
Also known as AZL-101924, BELL-CVE-2026-92522, DEBIAN-CVE-2026-92522, GHSA-jg3q-2vpp-2763, UBUNTU-CVE-2026-92522.