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: act_api: use RCU with deferred freeing for action lifecycle (CVE-2026-53264) 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 vulnerability CVE-2026-53264 affects the Linux kernel's net/sched act_api subsystem, specifically concerning the use of Read-Copy-Update (RCU) with deferred freeing for the action lifecycle. This flaw could potentially lead to use-after-free or race conditions in kernel code, as indicated by the associated CWEs (CWE-416: Use After Free, CWE-364: Signal Handler Race Condition). Red Hat has issued a security advisory (RHSA-2026:54482) providing an updated kernel package for Red Hat Enterprise Linux 9.4 to fix this issue. The update requires a system reboot to take effect. The advisory emphasizes the importance of applying kernel updates promptly due to the kernel's critical role in system security.
Potential Impact
The vulnerability affects the Linux kernel's core networking scheduling component and could lead to security issues such as memory corruption or race conditions, potentially impacting system stability or security. Red Hat rates the impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released an official security update for Red Hat Enterprise Linux 9.4 that addresses CVE-2026-53264. Users should apply the kernel update provided in advisory RHSA-2026:54482 and reboot their systems to ensure the fix takes effect. Red Hat strongly recommends not delaying this update to maintain system security.
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: act_api: use RCU with deferred freeing for action lifecycle (CVE-2026-53264) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-53264 affects the Linux kernel's net/sched act_api subsystem, specifically concerning the use of Read-Copy-Update (RCU) with deferred freeing for the action lifecycle. This flaw could potentially lead to use-after-free or race conditions in kernel code, as indicated by the associated CWEs (CWE-416: Use After Free, CWE-364: Signal Handler Race Condition). Red Hat has issued a security advisory (RHSA-2026:54482) providing an updated kernel package for Red Hat Enterprise Linux 9.4 to fix this issue. The update requires a system reboot to take effect. The advisory emphasizes the importance of applying kernel updates promptly due to the kernel's critical role in system security.
Potential Impact
The vulnerability affects the Linux kernel's core networking scheduling component and could lead to security issues such as memory corruption or race conditions, potentially impacting system stability or security. Red Hat rates the impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released an official security update for Red Hat Enterprise Linux 9.4 that addresses CVE-2026-53264. Users should apply the kernel update provided in advisory RHSA-2026:54482 and reboot their systems to ensure the fix takes effect. Red Hat strongly recommends not delaying this update to maintain system security.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vq3g-6qwh-5wj2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53264"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6ae5389c2644c7f8986a28
Added to database: 07/30/2026, 05:46:32 UTC
Last enriched: 08/13/2026, 19:30:06 UTC
Last updated: 09/11/2026, 07:31:54 UTC
Views: 70
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