Red Hat Security Advisory: 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: net/sched: Always pass notifications when child class becomes empty (CVE-2025-38350) * kernel: idpf: convert control queue mutex to a spinlock (CVE-2025-38392) * kernel: drm/gem: Acquire references on GEM handles for framebuffers (CVE-2025-38449) 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.
AI Analysis
Technical Summary
The Red Hat kernel-rt security update addresses three vulnerabilities in the Real Time Linux Kernel. CVE-2025-38350 fixes an issue in the net/sched subsystem to ensure notifications are always passed when a child class becomes empty. CVE-2025-38392 converts a control queue mutex to a spinlock in the idpf driver to improve synchronization. CVE-2025-38449 ensures proper acquisition of references on GEM handles for framebuffers in the drm/gem subsystem. These fixes are included in an update for Red Hat Enterprise Linux for Real Time 8 and require a system reboot to take effect. The advisory rates the update as Important and does not provide CVSS scores directly but classifies the impact as high severity.
Potential Impact
The vulnerabilities affect the kernel-rt packages used in Red Hat Enterprise Linux for Real Time 8 and related variants. They potentially impact system stability and security by addressing synchronization and resource management issues in kernel subsystems. The advisory does not report known exploits in the wild. The update mitigates these issues, reducing risk of kernel-level faults or misuse.
Mitigation Recommendations
Red Hat has released an official security update for the kernel-rt packages that addresses these vulnerabilities. Users should apply the update as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) and reboot affected systems to ensure the fixes take effect. No additional mitigation steps are indicated beyond applying the official patch and rebooting.
Red Hat Security Advisory: kernel-rt security update
Description
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: net/sched: Always pass notifications when child class becomes empty (CVE-2025-38350) * kernel: idpf: convert control queue mutex to a spinlock (CVE-2025-38392) * kernel: drm/gem: Acquire references on GEM handles for framebuffers (CVE-2025-38449) 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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat kernel-rt security update addresses three vulnerabilities in the Real Time Linux Kernel. CVE-2025-38350 fixes an issue in the net/sched subsystem to ensure notifications are always passed when a child class becomes empty. CVE-2025-38392 converts a control queue mutex to a spinlock in the idpf driver to improve synchronization. CVE-2025-38449 ensures proper acquisition of references on GEM handles for framebuffers in the drm/gem subsystem. These fixes are included in an update for Red Hat Enterprise Linux for Real Time 8 and require a system reboot to take effect. The advisory rates the update as Important and does not provide CVSS scores directly but classifies the impact as high severity.
Potential Impact
The vulnerabilities affect the kernel-rt packages used in Red Hat Enterprise Linux for Real Time 8 and related variants. They potentially impact system stability and security by addressing synchronization and resource management issues in kernel subsystems. The advisory does not report known exploits in the wild. The update mitigates these issues, reducing risk of kernel-level faults or misuse.
Mitigation Recommendations
Red Hat has released an official security update for the kernel-rt packages that addresses these vulnerabilities. Users should apply the update as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) and reboot affected systems to ensure the fixes take effect. No additional mitigation steps are indicated beyond applying the official patch and rebooting.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:15786
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-38392","CVE-2025-38449"]
- Cvss Version
- null
Threat ID: 6a3da1e44853345fc182cf66
Added to database: 06/25/2026, 21:47:16 UTC
Last enriched: 06/25/2026, 22:30:58 UTC
Last updated: 07/03/2026, 08:51:21 UTC
Views: 11
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