Riskcovery

CVE-2021-46953

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

State
Published
Severity
Not scored
Published
Feb 27, 2024
Updated
May 11, 2026
Reserved
Feb 25, 2024

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before c3385a9122f8db15b453e07bfc88117fce7f3724Affected
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before 7b2162db1498c71962a4bb2f776fa4e76d4d305bAffected
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before 504632a3577a049dd9bb7aabae5b4476f9c586b4Affected
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before e0f2d86481eaa83df33b0793f75212919db7a19dAffected
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before 42e69521ee1fa5abf21f478d147d06bbfe6bf6a8Affected
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before 596e079c362ac17ed02aa1b99fdc444d62072a01Affected
  • ca9ae5ec4ef0ed13833b03297ab319676965492c to before 1ecd5b129252249b9bc03d7645a7bda512747277Affected
LinuxLinux
  • 4.12Affected
  • before 4.12Not affected
  • 4.14.233 through 4.14.*Not affected
  • 4.19.191 through 4.19.*Not affected
  • 5.4.118 through 5.4.*Not affected
  • 5.10.36 through 5.10.*Not affected
  • 5.11.20 through 5.11.*Not affected
  • 5.12.3 through 5.12.*Not affected
  • 5.13 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.