Incorrect Calculation Affecting kernel-rt-modules-extra package, versions <0:4.18.0-348.rt7.130.el8
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTMODULESEXTRA-2128727
- published 26 Jul 2021
- disclosed 21 May 2021
Introduced: 21 May 2021
CVE-2021-31440 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-modules-extra to version 0:4.18.0-348.rt7.130.el8 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-modules-extra package and not the kernel-rt-modules-extra package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.
References
- https://access.redhat.com/security/cve/CVE-2021-31440
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bf4e83167cc68595b85fd73bb91e8f2c086e36
- https://www.zerodayinitiative.com/advisories/ZDI-21-503/
- https://access.redhat.com/errata/RHSA-2021:4140
- https://security.netapp.com/advisory/ntap-20210706-0003/