RHSA-2021:2523: Important: kernel security and bug fix update
First published: Tue Jun 22 2021(Updated: )
The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)</li> <li> kernel: use-after-free in fs/block_dev.c (CVE-2020-15436)</li> 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.<br>Bug Fix(es):<br><li> RHEL7.7 - s390/dasd: Fix zero write for FBA devices (BZ#1931440)</li> <li> Kernel experiences panic in update_group_power() due to division error even with Bug 1701115 fix (BZ#1961623)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/bpftool | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/bpftool-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-abi-whitelists | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-doc | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-headers | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-libs | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/perf | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/perf-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/python-perf | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/python-perf-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/bpftool | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/bpftool-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debuginfo-common-s390x | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-headers | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-kdump | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-kdump-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-kdump-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/perf | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/perf-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/python-perf | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/python-perf-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-bootwrapper | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debuginfo-common-ppc64 | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-libs | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/bpftool | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/bpftool-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-bootwrapper | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debug-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-debuginfo-common-ppc64le | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-headers | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-libs | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/kernel-tools-libs-devel | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/perf | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/perf-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/python-perf | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
| redhat/python-perf-debuginfo | <3.10.0-1062.51.1.el7 | 3.10.0-1062.51.1.el7 |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2021:2523?
The severity of RHSA-2021:2523 is classified as Important due to potential exploits.
How do I fix RHSA-2021:2523?
To fix RHSA-2021:2523, update the kernel packages to version 3.10.0-1062.51.1.el7 provided by Red Hat.
What vulnerabilities are addressed in RHSA-2021:2523?
RHSA-2021:2523 addresses vulnerabilities including an integer overflow in Intel Graphics Drivers (CVE-2020-12362) and a use-after-free issue in fs/block_dev.c (CVE-2020-15436).
Which packages are affected by RHSA-2021:2523?
Affected packages include the kernel, bpftool, and their respective debug variants on Red Hat Enterprise Linux 7.
Is it safe to continue using affected systems while waiting to address RHSA-2021:2523?
It is not recommended to continue using affected systems without applying the updates as they could be exploited.
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