Out-of-bounds Write Affecting kernel-rt-debug-kvm package, versions <0:4.18.0-477.10.1.rt7.274.el8_8
Threat Intelligence
EPSS
0.04% (6th
percentile)
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUGKVM-2954041
- published 20 Jul 2022
- disclosed 8 Jul 2022
Introduced: 8 Jul 2022
CVE-2021-33655 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-debug-kvm to version 0:4.18.0-477.10.1.rt7.274.el8_8 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.
References
- https://access.redhat.com/security/cve/CVE-2021-33655
- http://www.openwall.com/lists/oss-security/2022/07/19/2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- https://www.debian.org/security/2022/dsa-5191
CVSS Scores
version 3.1