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Red Hat: RHSA-2021-0354-01 Important Kernel-alt Security Update

red hat
Calendar Grey February 2, 2021
Dist Redhat Esm H88
CentOS Stream 9 receives a vital software patch for its kernel component, addressing severe vulnerabilities that could impact system security.
An update for kernel-alt is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Summary

The kernel-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
* kernel: some ipv6 protocols not encrypted over ipsec tunnel (CVE-2020-1749)
* kernel: use-after-free in fs/block_dev.c (CVE-2020-15436)
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.

Topics%20covered

Topics Covered

security advisory Red Hat important Red Hat Enterprise security impact use-after-free Important kernel-alt ipv6 encryption

References

https://access.redhat.com/security/cve/CVE-2020-1749 https://access.redhat.com/security/cve/CVE-2020-15436 https://access.redhat.com/security/cve/CVE-2020-29661 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source: kernel-alt-4.14.0-115.35.1.el7a.src.rpm
aarch64: kernel-4.14.0-115.35.1.el7a.aarch64.rpm kernel-debug-4.14.0-115.35.1.el7a.aarch64.rpm kernel-debug-debuginfo-4.14.0-115.35.1.el7a.aarch64.rpm kernel-debug-devel-4.14.0-115.35.1.el7a.aarch64.rpm kernel-debuginfo-4.14.0-115.35.1.el7a.aarch64.rpm kernel-debuginfo-common-aarch64-4.14.0-115.35.1.el7a.aarch64.rpm kernel-devel-4.14.0-115.35.1.el7a.aarch64.rpm kernel-headers-4.14.0-115.35.1.el7a.aarch64.rpm kernel-tools-4.14.0-115.35.1.el7a.aarch64.rpm kernel-tools-debuginfo-4.14.0-115.35.1.el7a.aarch64.rpm kernel-tools-libs-4.14.0-115.35.1.el7a.aarch64.rpm perf-4.14.0-115.35.1.el7a.aarch64.rpm perf-debuginfo-4.14.0-115.35.1.el7a.aarch64.rpm python-perf-4.14.0-115.35.1.el7a.aarch64.rpm python-perf-debuginfo-4.14.0-115.35.1.el7a.aarch64.rpm
noarch: kernel-abi-whitelists-4.14.0-115.35.1.el7a.noarch.rpm kernel-doc-4.14.0-115.35.1.el7a.noarch.rpm
ppc64le: kernel-4.14.0-115.35.1.el7a.ppc64le.rpm kernel-bootwrapper-4.14.0-115.35.1.el7a.ppc64le.rpm kernel-debug-4.14.0-115.35.1.el7a.ppc64le.rpm kernel-debug-debuginfo-4.14.0-115.35.1.el7a.ppc64le.rpm kernel-debuginfo-4.14.0-115.35.1.el7a.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0354-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0354
Issue date: 2021-02-02

Topic

An update for kernel-alt is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat important Red Hat Enterprise security impact use-after-free Important kernel-alt ipv6 encryption

Relevant Releases Architectures

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le

Bugs Fixed

1809833 - CVE-2020-1749 kernel: some ipv6 protocols not encrypted over ipsec tunnel

1901168 - CVE-2020-15436 kernel: use-after-free in fs/block_dev.c

1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free

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