RHSA-2021:1070: 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.Security Fix(es): kernel: out-of-bounds read in libiscsi module (CVE-2021-27364) kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365) kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363) 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): RHEL7.9 Realtime crashes due to a blocked task detection. The blocked task is stuck in unregistershrinker() where multiple tasks have taken the shrinkerrwsem and are fighting on a dentry's dlockref lock rtmutex. [kernel-rt] (BZ#1935557) kernel-rt: update to the latest RHEL7.9.z5 source tree (BZ#1939220)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:1070?
RHSA-2021:1070 has significant severity due to vulnerabilities including an out-of-bounds read and a heap buffer overflow in the kernel-rt packages.
How do I fix RHSA-2021:1070?
To fix RHSA-2021:1070, update the kernel-rt packages to version 3.10.0-1160.24.1.rt56.1161.el7 or later.
What vulnerabilities are addressed in RHSA-2021:1070?
RHSA-2021:1070 addresses vulnerabilities including CVE-2021-27364 related to out-of-bounds read and a heap buffer overflow in the libiscsi module.
Which packages are affected by RHSA-2021:1070?
The affected packages in RHSA-2021:1070 include kernel-rt, kernel-rt-debug, kernel-rt-kvm, and their respective debug and development packages.
What systems are impacted by RHSA-2021:1070?
RHSA-2021:1070 impacts systems using Red Hat Enterprise Linux 7 with real-time kernel configurations.