Red Hat Security Advisory: kernel security update
This Red Hat security advisory addresses multiple vulnerabilities in the Linux kernel packages, which form the core of the operating system. The update fixes issues including improper removal of classes in network scheduling (CVE-2025-71066), SCTP list cursor revalidation (CVE-2026-46227), and two use-after-free vulnerabilities in KVM x86 shadow paging (CVE-2026-46113 and CVE-2026-53359). These vulnerabilities have been rated with a high security impact by Red Hat. The advisory applies to Red Hat Enterprise Linux 10 and related variants. A kernel update is available and must be applied with a system reboot to take effect.
AI Analysis
Technical Summary
The advisory covers four kernel vulnerabilities: CVE-2025-71066 fixes an issue in net/sched's ets_qdisc_change where a class was not always removed from the active list before deletion; CVE-2026-46227 addresses SCTP's sctp_sendmsg_to_asoc() function to revalidate the list cursor in SCTP_SENDALL; CVE-2026-46113 and CVE-2026-53359 fix use-after-free bugs in KVM x86 shadow paging caused by unexpected guest frame numbers and roles, respectively. These issues could lead to memory corruption or instability in the kernel. Red Hat has released patched kernel packages for Red Hat Enterprise Linux 10 and related products. The update requires a system reboot to activate the fixes.
Potential Impact
Exploitation of these vulnerabilities could result in kernel memory corruption or instability due to use-after-free conditions and improper list handling in kernel subsystems such as network scheduling, SCTP, and KVM virtualization. This could potentially allow attackers to cause denial of service or escalate privileges, impacting system security and stability. Red Hat rates the security impact as Important (high). There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official kernel update that addresses these vulnerabilities. Users of Red Hat Enterprise Linux 10 and related variants should apply the update as soon as possible following Red Hat's guidance at https://access.redhat.com/articles/11258. A system reboot is required for the update to take effect. No additional mitigations are specified or required beyond applying the official patch.
Red Hat Security Advisory: kernel security update
Description
This Red Hat security advisory addresses multiple vulnerabilities in the Linux kernel packages, which form the core of the operating system. The update fixes issues including improper removal of classes in network scheduling (CVE-2025-71066), SCTP list cursor revalidation (CVE-2026-46227), and two use-after-free vulnerabilities in KVM x86 shadow paging (CVE-2026-46113 and CVE-2026-53359). These vulnerabilities have been rated with a high security impact by Red Hat. The advisory applies to Red Hat Enterprise Linux 10 and related variants. A kernel update is available and must be applied with a system reboot to take effect.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory covers four kernel vulnerabilities: CVE-2025-71066 fixes an issue in net/sched's ets_qdisc_change where a class was not always removed from the active list before deletion; CVE-2026-46227 addresses SCTP's sctp_sendmsg_to_asoc() function to revalidate the list cursor in SCTP_SENDALL; CVE-2026-46113 and CVE-2026-53359 fix use-after-free bugs in KVM x86 shadow paging caused by unexpected guest frame numbers and roles, respectively. These issues could lead to memory corruption or instability in the kernel. Red Hat has released patched kernel packages for Red Hat Enterprise Linux 10 and related products. The update requires a system reboot to activate the fixes.
Potential Impact
Exploitation of these vulnerabilities could result in kernel memory corruption or instability due to use-after-free conditions and improper list handling in kernel subsystems such as network scheduling, SCTP, and KVM virtualization. This could potentially allow attackers to cause denial of service or escalate privileges, impacting system security and stability. Red Hat rates the security impact as Important (high). There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official kernel update that addresses these vulnerabilities. Users of Red Hat Enterprise Linux 10 and related variants should apply the update as soon as possible following Red Hat's guidance at https://access.redhat.com/articles/11258. A system reboot is required for the update to take effect. No additional mitigations are specified or required beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:36956
- Cve Count
- 4
- Additional Cves
- ["CVE-2026-46113","CVE-2026-46227","CVE-2026-53359"]
- Cvss Version
- null
Threat ID: 6a4f6c1768715ace43155063
Added to database: 07/09/2026, 09:38:31 UTC
Last enriched: 07/09/2026, 09:43:19 UTC
Last updated: 07/10/2026, 03:47:18 UTC
Views: 14
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