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 [almalinux-8] (BZ#2172163)
* The latest AlmaLinux 8.7.z3 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2172278)
Fixed packages 12
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 8 | kernel-rt | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-core | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-debug | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-debug-core | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-debug-devel | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-debug-kvm | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-debug-modules | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-debug-modules-extra | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-devel | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-kvm | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-modules | 4.18.0-425.19.2.rt7.230.el8_7 |
| AlmaLinux · 8 | kernel-rt-modules-extra | 4.18.0-425.19.2.rt7.230.el8_7 |
Vulnerabilities 4
-
High 7.9
Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. …
KEV Mar 30, 2023 -
High 7.8
A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities w…
KEV Jun 17, 2025 -
High 7.8
A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters …
-
Medium 5.5
A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirec…
References
-
report
https://access.redhat.com/security/cve/CVE-2022-4269
-
report
https://access.redhat.com/security/cve/CVE-2022-4378
-
report
https://access.redhat.com/security/cve/CVE-2023-0266
-
report
https://access.redhat.com/security/cve/CVE-2023-0386
-
report
https://bugzilla.redhat.com/2150272
-
report
https://bugzilla.redhat.com/2152548
-
report
https://bugzilla.redhat.com/2159505
-
report
https://bugzilla.redhat.com/2163379
-
advisory
https://errata.almalinux.org/8/ALSA-2023-1584.html