Race Condition Affecting kernel-rt-debug package, versions <0:4.18.0-240.22.1.rt7.77.el8_3
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUG-2092194
- published 26 Jul 2021
- disclosed 5 Feb 2021
Introduced: 5 Feb 2021
CVE-2021-26708 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-debug to version 0:4.18.0-240.22.1.rt7.77.el8_3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.
References
- https://security.netapp.com/advisory/ntap-20210312-0008/
- https://access.redhat.com/security/cve/CVE-2021-26708
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
- https://www.openwall.com/lists/oss-security/2021/02/04/5
- http://www.openwall.com/lists/oss-security/2021/02/05/6
- http://www.openwall.com/lists/oss-security/2021/04/09/2
- https://access.redhat.com/errata/RHSA-2021:1081
- http://www.openwall.com/lists/oss-security/2022/01/25/14