RHSA-2023:1584: 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: stack overflow in doprocdointvec and procskipspaces (CVE-2022-4378) ALSA: pcm: Move rwsem lock inside sndctlelemread to prevent UAF (CVE-2023-0266) kernel: FUSE filesystem low-privileged user privileges escalation (CVE-2023-0386) kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269) 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): Lazy irqwork does not raise softirq on PREEMPTRT [rhel-8] (BZ#2172163) The latest RHEL 8.7.z3 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2172278)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2023:1584?
The severity of RHSA-2023:1584 is classified as important.
How do I fix RHSA-2023:1584?
To fix RHSA-2023:1584, update to the kernel-rt package version 4.18.0-425.19.2.rt7.230.el8_7.
What vulnerabilities are addressed in RHSA-2023:1584?
RHSA-2023:1584 addresses a stack overflow vulnerability in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378).
Which systems are affected by RHSA-2023:1584?
RHSA-2023:1584 affects systems running kernel-rt versions prior to 4.18.0-425.19.2.rt7.230.el8_7.
Is there a risk of exploitation from RHSA-2023:1584?
Yes, the vulnerabilities addressed in RHSA-2023:1584 have the potential for exploitation, particularly in environments demanding high determinism.