CVE-2026-92522

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.

References

• https://git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e
• https://git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6
• https://git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646
• https://git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3
• https://git.kernel.org/stable/c/5601bd81bc290a724ed47797d22c16cba4d7ed9f