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: ipvlan: out-of-bounds write caused by unclear skb->cb (CVE-2023-3090)
* kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt() (CVE-2023-35788)
* kernel: KVM: x86/mmu: race condition in direct_page_fault() (CVE-2022-45869)
* kernel: speculative pointer dereference in do_prlimit() in kernel/sys.c (CVE-2023-0458)
* kernel: Spectre v2 SMT mitigations problem (CVE-2023-1998)
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.
Fixed packages 14
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | kernel-rt | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-core | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug-core | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug-devel | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug-kvm | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug-modules | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug-modules-core | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-debug-modules-extra | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-devel | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-kvm | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-modules | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-modules-core | 5.14.0-284.25.1.rt14.310.el9_2 |
| AlmaLinux · 9 | kernel-rt-modules-extra | 5.14.0-284.25.1.rt14.310.el9_2 |
Vulnerabilities 5
-
High 7.8
Out-of-bounds write in Linux kernel's ipvlan network driver
A heap out-of-bounds write vulnerability in the Linux Kernel ipvlan network driver can be exploited to achieve local privilege escalation. The out-of-bounds write is caused by missing skb->cb initialization in the ipvlan network driver. The vulnerability is r…
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High 7.8CVE-2023-35788 Public exploit
An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an o…
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Medium 5.6CVE-2023-1998 Public exploit
Spectre v2 SMT mitigations problem in Linux kernel
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel sti…
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Medium 5.5
A race condition in the x86 KVM subsystem in the Linux kernel through 6.1-rc6 allows guest OS users to cause a denial o…
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Medium 5.3
Spectre V1 Gadget in do_prlimit in the Linux Kernel
A speculative pointer dereference problem exists in the Linux Kernel on the do_prlimit() function. The resource argument value is controlled and is used in pointer arithmetic for the 'rlim' variable and can be used to leak the contents. We recommend upgrading…
References
-
report
https://access.redhat.com/security/cve/CVE-2022-45869
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report
https://access.redhat.com/security/cve/CVE-2023-0458
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report
https://access.redhat.com/security/cve/CVE-2023-1998
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report
https://access.redhat.com/security/cve/CVE-2023-3090
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report
https://access.redhat.com/security/cve/CVE-2023-35788
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report
https://bugzilla.redhat.com/2151317
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report
https://bugzilla.redhat.com/2187257
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report
https://bugzilla.redhat.com/2193219
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report
https://bugzilla.redhat.com/2215768
-
report
https://bugzilla.redhat.com/2218672
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advisory
https://errata.almalinux.org/9/ALSA-2023-4378.html