CVE-2026-92522

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 5601bd81bc290a724ed47797d22c16cba4d7ed9faffected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < ff82e3374e9103d046b2a82f4315d9a422ff097daffected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 2a5520065e76000f8c979d3d7b3d861ccaaecf1eaffected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 8e67b58c04990817ac2dbf8ae03353be6a358cd4affected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 74d84320f8e37955eb286a7777843d554e6e75b2affected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 4d8ecaa332c163f2b44aa5027bf061950b71b5f3affected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 355bee5f11acb116cd256588631b4028ca562646affected
LinuxLinuxecf5636dcd59cd5508641f995cc4c2bafedbb995 < 2c50ffdc73f3a70d745d249f509fc290754121e6affected
LinuxLinux4.0affected
LinuxLinux0 < 4.0unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References