CVE-2021-46953
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…
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.7 MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277Patch
- https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8Patch
- https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4Patch
- https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01Patch
- https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305bPatch
- https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724Patch
- https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19dPatch
- https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277Patch
- https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8Patch
- https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4Patch
- https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01Patch
- https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305bPatch
- https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724Patch
- https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19dPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.