Use After Free Affecting kernel-rt-devel package, versions <0:4.18.0-372.9.1.rt7.166.el8
Threat Intelligence
EPSS
0.05% (18th
percentile)
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEVEL-1955602
- published 26 Jul 2021
- disclosed 3 Nov 2020
Introduced: 3 Nov 2020
CVE-2020-27820 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-devel to version 0:4.18.0-372.9.1.rt7.166.el8 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel package and not the kernel-rt-devel package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).
References
- https://access.redhat.com/security/cve/CVE-2020-27820
- https://access.redhat.com/errata/RHSA-2022:1975
- https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline@redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline@redhat.com/
- https://bugzilla.redhat.com/show_bug.cgi?id=1901726
- https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline%40redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline%40redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline%40redhat.com/
- https://www.oracle.com/security-alerts/cpujul2022.html
CVSS Scores
version 3.1