RHSA-2023:0854: 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: mm/mremap.c use-after-free vulnerability (CVE-2022-41222) kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945) kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873) 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): RHEL8-RT: Backport use of a dedicate thread for timer wakeups (BZ#2127204) SNO Crashed twice - kernel BUG at lib/listdebug.c:28 (BZ#2132062) Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel [RT-8] (BZ#2139851) scheduling while atomic in fpuclone() -> fpuinheritperms() (BZ#2154469) The latest RHEL 8.7.z2 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2159806)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2023:0854?
The severity of RHSA-2023:0854 is classified as critical due to multiple vulnerabilities, including a use-after-free and buffer overflow.
How do I fix RHSA-2023:0854?
To fix RHSA-2023:0854, update the affected kernel-rt packages to version 4.18.0-425.13.1.rt7.223.el8_7.
Which packages are affected by RHSA-2023:0854?
The affected packages include kernel-rt, kernel-rt-core, kernel-rt-debug, and kernel-rt-modules among others.
What vulnerabilities are addressed in RHSA-2023:0854?
RHSA-2023:0854 addresses a use-after-free vulnerability (CVE-2022-41222) and a buffer overflow vulnerability in nfsd.
Is RHSA-2023:0854 related to any specific Linux distributions?
Yes, RHSA-2023:0854 specifically affects the Red Hat Enterprise Linux 8 distribution.