CVE-2021-46953

MEDIUM
Published Feb 27, 2024 Modified Nov 21, 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.

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CVSS v3.1 Score

6.7
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277 https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4 https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01 https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724 https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277 https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4 https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01 https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724 https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d

Frequently Asked Questions

What is 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 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. It has a CVSS v3.1 base score of 6.7 (MEDIUM).
How severe is CVE-2021-46953? +
CVE-2021-46953 has a CVSS v3.1 score of 6.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2021-46953? +
CVE-2021-46953 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2021-46953? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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