RHSA-2021:4088: 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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385) kernel: out-of-bounds write due to a heap buffer overflow in hidinputchangeresolutionmultipliers() of hid-input.c (CVE-2021-0512) kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656) 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): kernel-rt: update RT source tree to the RHEL-8.4.z source tree (BZ#2004117)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:4088?
The severity of RHSA-2021:4088 is classified as moderate due to a use-after-free vulnerability in the Linux kernel.
How do I fix RHSA-2021:4088?
To fix RHSA-2021:4088, you should update your kernel-rt packages to version 4.18.0-305.25.1.rt7.97.el8_4 or later.
What is the nature of the vulnerability in RHSA-2021:4088?
The vulnerability in RHSA-2021:4088 is a use-after-free issue in the Infiniband driver, which may allow an attacker to execute arbitrary code.
Which packages are affected by RHSA-2021:4088?
The affected packages in RHSA-2021:4088 include kernel-rt, kernel-rt-core, and kernel-rt-debug among others.
Is there a specific operating system associated with RHSA-2021:4088?
RHSA-2021:4088 is associated with Red Hat Enterprise Linux 8.