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: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (CVE-2025-71066) * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227) * kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (CVE-2026-46113) * kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359) 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
This advisory covers four security fixes in the Linux kernel packages for Red Hat Enterprise Linux 10 and related builds. CVE-2025-71066 fixes an issue in the network scheduler where classes were not properly removed before deletion. CVE-2026-46227 addresses a SCTP protocol vulnerability involving list cursor revalidation after sending messages. CVE-2026-46113 and CVE-2026-53359 fix use-after-free vulnerabilities in the KVM x86 shadow paging implementation caused by unexpected guest frame numbers and roles. These issues could lead to memory corruption or instability. Red Hat has released patched kernel packages to remediate these vulnerabilities.
Potential Impact
The vulnerabilities affect the Linux kernel core in Red Hat Enterprise Linux 10 and related products, potentially allowing memory corruption or instability due to use-after-free bugs and improper list handling. These flaws could impact system reliability and security, with a high severity rating assigned by Red Hat. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
A security update for the kernel packages is available from Red Hat and should be applied promptly. The update includes fixes for all listed CVEs and requires a system reboot to activate. Refer to Red Hat's official advisory RHSA-2026:36956 and the update article https://access.redhat.com/articles/11258 for detailed instructions. No additional mitigation steps are indicated by the vendor.
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"]
Threat ID: 6a4f6c1768715ace43155063
Added to database: 07/09/2026, 09:38:31 UTC
Last enriched: 08/12/2026, 18:44:13 UTC
Last updated: 10/06/2026, 18:48:18 UTC
Views: 367
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