Time-of-check Time-of-use (TOCTOU) Affecting kernel-rt-modules-extra package, versions <0:4.18.0-305.rt7.72.el8


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELRTMODULESEXTRA-3981668
  • published26 Jul 2021
  • disclosed9 Sept 2020

Introduced: 9 Sep 2020

CVE-2020-25212  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-rt-modules-extra to version 0:4.18.0-305.rt7.72.el8 or higher.
This issue was patched in RHSA-2021:1739.

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 RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.

CVSS Scores

version 3.1