RedHat: RHSA-2023-1584:01 Important: kernel-rt
Summary
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 do_proc_dointvec and proc_skip_spaces
(CVE-2022-4378)
* ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read 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 irq_work does not raise softirq on PREEMPT_RT [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)
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
References
https://access.redhat.com/security/cve/CVE-2022-4269 https://access.redhat.com/security/cve/CVE-2022-4378 https://access.redhat.com/security/cve/CVE-2023-0266 https://access.redhat.com/security/cve/CVE-2023-0386 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source:
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.src.rpm
x86_64:
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-kvm-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 8):
Source:
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.src.rpm
x86_64:
kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
kernel-rt-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64
Red Hat Enterprise Linux for Real Time (v. 8) - x86_64
Bugs Fixed
2150272 - CVE-2022-4269 kernel: net: CPU soft lockup in TC mirred egress-to-ingress action
2152548 - CVE-2022-4378 kernel: stack overflow in do_proc_dointvec and proc_skip_spaces
2159505 - CVE-2023-0386 kernel: FUSE filesystem low-privileged user privileges escalation
2163379 - CVE-2023-0266 ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF