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.
References8
- git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e
- git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6
- git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646
- git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3
- git.kernel.org/stable/c/5601bd81bc290a724ed47797d22c16cba4d7ed9f
- git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2
- git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4
- git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d
Metrics
- CVSS 3.1
-
7.3
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 8 November 2026
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