Red Hat Security Advisory: kernel security update
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: eventpoll: defer struct eventpoll free to RCU grace period (CVE-2026-43074) * kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242) 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. Additional Changes: For detailed information on changes in this release, see the NVIDIA for RHEL 10 Release Notes linked from the References section.
AI Analysis
Technical Summary
Red Hat issued a security update for the Linux kernel to fix multiple vulnerabilities. The key fixes include deferring the freeing of struct eventpoll to the RCU grace period to prevent use-after-free (CVE-2026-43074) and correcting an ep_remove use-after-free involving struct eventpoll and struct file (CVE-2026-46242). Additionally, a netfilter ebtables SNAT target vulnerability (CVE-2026-53266) involving writes to shared memory pages during ARP hardware address rewriting is addressed. These vulnerabilities affect the kernel packages in Red Hat Enterprise Linux for NVIDIA 10 (kernel-6.12.0-231.15.el10nv). The advisory rates the update as important and requires a system reboot to complete remediation.
Potential Impact
The vulnerabilities fixed include use-after-free conditions in the eventpoll subsystem, which could lead to memory corruption or kernel crashes, and a netfilter ebtables SNAT target issue that involves unauthorized writes to shared memory pages during ARP hardware address rewriting. These issues could impact system stability and security. The advisory rates the security impact as important, indicating a high severity level but does not provide a CVSS score.
Mitigation Recommendations
Red Hat has released an official security update that addresses these vulnerabilities. Users should apply the kernel update for Red Hat Enterprise Linux for NVIDIA 10 as provided in the advisory RHSA-2026:36186. After applying the update, a system reboot is required to ensure the fixes take effect. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258 for detailed guidance.
Red Hat Security Advisory: kernel security update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: eventpoll: defer struct eventpoll free to RCU grace period (CVE-2026-43074) * kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242) 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. Additional Changes: For detailed information on changes in this release, see the NVIDIA for RHEL 10 Release Notes linked from the References section.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat issued a security update for the Linux kernel to fix multiple vulnerabilities. The key fixes include deferring the freeing of struct eventpoll to the RCU grace period to prevent use-after-free (CVE-2026-43074) and correcting an ep_remove use-after-free involving struct eventpoll and struct file (CVE-2026-46242). Additionally, a netfilter ebtables SNAT target vulnerability (CVE-2026-53266) involving writes to shared memory pages during ARP hardware address rewriting is addressed. These vulnerabilities affect the kernel packages in Red Hat Enterprise Linux for NVIDIA 10 (kernel-6.12.0-231.15.el10nv). The advisory rates the update as important and requires a system reboot to complete remediation.
Potential Impact
The vulnerabilities fixed include use-after-free conditions in the eventpoll subsystem, which could lead to memory corruption or kernel crashes, and a netfilter ebtables SNAT target issue that involves unauthorized writes to shared memory pages during ARP hardware address rewriting. These issues could impact system stability and security. The advisory rates the security impact as important, indicating a high severity level but does not provide a CVSS score.
Mitigation Recommendations
Red Hat has released an official security update that addresses these vulnerabilities. Users should apply the kernel update for Red Hat Enterprise Linux for NVIDIA 10 as provided in the advisory RHSA-2026:36186. After applying the update, a system reboot is required to ensure the fixes take effect. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258 for detailed guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:36186
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-46242"]
- Cvss Version
- null
Threat ID: 6a4cf0f7c9d9e3dbe31d343d
Added to database: 07/07/2026, 12:28:39 UTC
Last enriched: 07/30/2026, 14:54:54 UTC
Last updated: 08/21/2026, 04:34:10 UTC
Views: 309
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