RHSA-2021:0774: 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: bad kfree in auditfilter.c may lead to escalation of privilege (CVE-2020-0444)</li> <li> kernel: Local buffer overflow in ctnetlinkparsetuplefilter in net/netfilter/nfconntracknetlink.c (CVE-2020-25211)</li> <li> kernel: locking issue in drivers/tty/ttyjobctrl.c can lead to an use-after-free (CVE-2020-29661)</li> <li> kernel: performance counters race condition use-after-free (CVE-2020-14351)</li> <li> kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)</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> kernel-rt: update RT source tree to the latest RHEL-8.2.z7 Batch source tree (BZ#1915947)</li> <li> kernel-rt possible livelock: WARNING: CPU: 28 PID: 3109 at kernel/ptrace.c:242 ptracecheckattach+0xdd/0x1a0 (BZ#1925309)</li>
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:0774?
The severity of RHSA-2021:0774 is considered to be high due to the potential for privilege escalation.
How do I fix RHSA-2021:0774?
To fix RHSA-2021:0774, you should update your kernel-rt packages to version 4.18.0-193.46.1.rt13.96.el8_2.
What is affected by RHSA-2021:0774?
RHSA-2021:0774 affects various kernel-rt packages including kernel-rt, kernel-rt-core, and kernel-rt-debug modules.
What vulnerability does RHSA-2021:0774 address?
RHSA-2021:0774 addresses a vulnerability in auditfilter.c that may lead to escalation of privilege (CVE-2020-0444).
Is there a workaround for RHSA-2021:0774?
There is no specific workaround for RHSA-2021:0774; the recommended action is to update the affected packages.