RHSA-2022:0187: 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: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout (CVE-2021-4154) kernel: xfs: raw block device data leak in XFSIOCALLOCSP IOCTL (CVE-2021-4155) kernel: fscontext: heap overflow in legacy parameter handling (CVE-2022-0185) 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): kernnel-rt-debug: do not call blocking ops when !TASKRUNNING; state=1 set at [<0000000050e86018>] handleuserfault+0x530/0x1820 (BZ#2029421) kernel-rt: update RT source tree to the RHEL-8.4.z6 source tree (BZ#2029592)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2022:0187?
The severity of RHSA-2022:0187 is rated as high due to the potential for local privilege escalation and container breakout.
How do I fix RHSA-2022:0187?
To fix RHSA-2022:0187, update the affected kernel-rt packages to version 4.18.0-305.34.2.rt7.107.el8_4 or later.
What vulnerability does RHSA-2022:0187 address?
RHSA-2022:0187 addresses a local privilege escalation vulnerability that can be exploited via the fsconfig syscall parameter.
What software is affected by RHSA-2022:0187?
RHSA-2022:0187 affects the kernel-rt and kernel-rt-core packages on Red Hat systems.
Is there a workaround for RHSA-2022:0187 if I cannot apply the patch?
Currently, there are no recommended workarounds for RHSA-2022:0187, so applying the patch is essential.