Improper Input Validation Affecting kernel-rt-kvm package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRTKVM-6302008
- published 28 Feb 2024
- disclosed 27 Feb 2024
Introduced: 27 Feb 2024
CVE-2021-46953 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt-kvm.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2021-46953
- 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