RHSA-2021:0878 — Security Advisory

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

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Severity

Important

Red Hat Product Security

RHEL 7

Products

Official CSAF product identity

Published · March 17, 2021

Updated · June 28, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
kernel: performance counters race condition use-after-free (CVE-2020-14351)
kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)
kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

Security patch for CVE-2020-25212 breaks directory listings via 'ls' on NFS V4.2 shares mounted with selinux enabled labels (BZ#1919144)
Enable CI and changelog for GitLab workflow (BZ#1930931)

Enhancement(s):

[Cavium 7.7 Feat] qla2xxx: Update to latest upstream. (BZ#1918534)