Race Condition Affecting kernel-tools package, versions <0:4.18.0-193.79.1.el8_2
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLS-4006293
- published 15 Dec 2021
- disclosed 3 Dec 2021
Introduced: 3 Dec 2021
CVE-2021-4083 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-tools to version 0:4.18.0-193.79.1.el8_2 or higher.
This issue was patched in RHSA-2022:0820.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.
References
- https://access.redhat.com/security/cve/CVE-2021-4083
- https://bugzilla.redhat.com/show_bug.cgi?id=2029923
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://security.netapp.com/advisory/ntap-20220217-0005/
- https://www.debian.org/security/2022/dsa-5096
- https://www.oracle.com/security-alerts/cpujul2022.html