Use After Free Affecting kernel-rt-debug-kvm package, versions <0:3.10.0-1160.21.1.rt56.1158.el7
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRTDEBUGKVM-2182860
- published 26 Jul 2021
- disclosed 16 Oct 2020
Introduced: 16 Oct 2020
CVE-2020-25656 Open this link in a new tabHow to fix?
Upgrade Centos:7 kernel-rt-debug-kvm to version 0:3.10.0-1160.21.1.rt56.1158.el7 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:7 relevant fixed versions and status.
A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.
References
- https://access.redhat.com/security/cve/CVE-2020-25656
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726
- https://lkml.org/lkml/2020/10/16/84
- https://lkml.org/lkml/2020/10/29/528
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
- https://access.redhat.com/errata/RHSA-2021:0857
- https://www.starwindsoftware.com/security/sw-20210325-0006/