Resource Exhaustion Affecting kernel-rt-devel package, versions <0:3.10.0-1160.21.1.rt56.1158.el7
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRTDEVEL-2181986
- published 26 Jul 2021
- disclosed 24 Jan 2016
Introduced: 24 Jan 2016
CVE-2021-20265 Open this link in a new tabHow to fix?
Upgrade Centos:7 kernel-rt-devel 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-devel package and not the kernel-rt-devel package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.
References
- https://access.redhat.com/security/cve/CVE-2021-20265
- https://bugzilla.redhat.com/show_bug.cgi?id=1908827
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://access.redhat.com/errata/RHSA-2021:0857