CVE-2026-92522
Published: September 19, 2026Last modified: October 6, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.3 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | LOW |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.189-r0) |
| 25 LTS | linux-lts | Fixed (6.12.111-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
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
- https://git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2
- https://git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4
- https://git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d