CVE-2021-46953

ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure

MEDIUM

6.7

CVSS Score

Published: February 27, 2024 at 06:40 PM UTC

Updated: June 17, 2026 at 04:15 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM6.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.12 ≤ v < 4.14.2334.12 ≤ v < 4.19.1914.12 ≤ v < 5.10.364.12 ≤ v < 5.11.204.12 ≤ v < 5.12.34.12 ≤ v < 5.134.12 ≤ v < 5.4.1184.12.0 ≤ v < 4.14.2334.15.0 ≤ v < 4.19.1914.20.0 ≤ v < 5.4.1185.11.0 ≤ v < 5.11.205.12.0 ≤ v < 5.12.35.5.0 ≤ v < 5.10.364.12ca9ae5ec4ef0ed13833b03297ab319676965492c

Vendor states this is fixed in 1ecd5b129252249b9bc03d7645a7bda512747277 (fixed)

Vendor states this is fixed in 42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 (fixed)

Vendor states this is fixed in 504632a3577a049dd9bb7aabae5b4476f9c586b4 (fixed)

Vendor states this is fixed in 596e079c362ac17ed02aa1b99fdc444d62072a01 (fixed)

Vendor states this is fixed in 7b2162db1498c71962a4bb2f776fa4e76d4d305b (fixed)

Vendor states this is fixed in c3385a9122f8db15b453e07bfc88117fce7f3724 (fixed)

Vendor states this is fixed in e0f2d86481eaa83df33b0793f75212919db7a19d (fixed)

Vendor states this is fixed in 4.12 (unaffected)

Vendor states this is fixed in 4.14.233 (unaffected)

Vendor states this is fixed in 4.19.191 (unaffected)

Vendor states this is fixed in 5.10.36 (unaffected)

Vendor states this is fixed in 5.11.20 (unaffected)