# CVE-2021-46953: linux: In the Linux kernel, the following vulnerability has been resolved:  ACPI: GTDT: Don't corrupt interrupt mappings on...

CVE-2021-46953 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46953, released February 27, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-46953
- Priority: Routine
- CVSS: 6.7 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 27, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.10.38-1 | [DEBIAN-CVE-2021-46953](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46953.md) | Feb 27, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.38-1 | [DEBIAN-CVE-2021-46953](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46953.md) | Feb 27, 2024 |
| Linux | linux Debian 14 | 5.10.38-1 | [DEBIAN-CVE-2021-46953](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46953.md) | Feb 27, 2024 |

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