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ALSA-2026:3964 Not scored

Moderate: kernel-rt security 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: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085) * kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001) 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.

Exploit probability Not scored
Published March 9, 2026
Required by Not available
Last source change March 13, 2026

02 / AFFECTED SOFTWARE

Affected packages

AlmaLinux:8 kernel-rt
AlmaLinux:8 kernel-rt-core
AlmaLinux:8 kernel-rt-debug
AlmaLinux:8 kernel-rt-debug-core
AlmaLinux:8 kernel-rt-debug-devel
AlmaLinux:8 kernel-rt-debug-modules
AlmaLinux:8 kernel-rt-debug-modules-extra
AlmaLinux:8 kernel-rt-devel
AlmaLinux:8 kernel-rt-modules
AlmaLinux:8 kernel-rt-modules-extra

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities ALSA-2026:3964

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: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085) * kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001) 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.

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05 / REFERENCES

Further evidence