RHSA-2021:4779: Important: kernel-rt security and bug fix update
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.<br>Security Fix(es):<br><li> kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)</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> BUG: scheduling while atomic: bz722926/3905/0x00000002 regresion case with zram (BZ#1833860)</li> <li> kernel-rt: update to the latest RHEL7.9.z10 source tree (BZ#2009077)</li>
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:4779?
The severity of RHSA-2021:4779 is classified as important due to the potential for a use-after-free vulnerability in the kernel.
How do I fix RHSA-2021:4779?
To fix RHSA-2021:4779, update to the kernel-rt package version 3.10.0-1160.49.1.rt56.1189.el7 or later.
Which systems are affected by RHSA-2021:4779?
Systems running the affected kernel-rt package versions prior to 3.10.0-1160.49.1.rt56.1189.el7 are vulnerable to RHSA-2021:4779.
What type of vulnerability is addressed in RHSA-2021:4779?
RHSA-2021:4779 addresses a use-after-free vulnerability found in drivers/infiniband/core/ucma.c.
Is a reboot required after applying the fix for RHSA-2021:4779?
Yes, a reboot is required after applying the update to ensure the new kernel is loaded.