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: 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) * kernel: XFS data corruption using reflink () 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 advisory covers kernel vulnerabilities in Red Hat Enterprise Linux 8.8, specifically two KVM x86 use-after-free flaws caused by unexpected guest frame numbers and roles, and an XFS filesystem data corruption issue involving reflink operations. These flaws could lead to memory corruption or data integrity problems. Red Hat has released updated kernel packages to address these vulnerabilities. The advisory rates the security impact as Important (high severity) and requires rebooting the system after applying the update.
Potential Impact
Successful exploitation of the KVM use-after-free vulnerabilities could cause memory corruption, potentially leading to system instability or privilege escalation within virtualized environments. The XFS reflink issue could result in data corruption on affected filesystems. These impacts affect the integrity and stability of systems running the vulnerable kernel versions.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the available kernel updates for Red Hat Enterprise Linux 8.8 as described in the Red Hat advisory (RHSA-2026:41229) and reboot their systems to ensure the fixes take effect. Patch status is confirmed as official-fix by Red Hat.
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: 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) * kernel: XFS data corruption using reflink () 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 advisory covers kernel vulnerabilities in Red Hat Enterprise Linux 8.8, specifically two KVM x86 use-after-free flaws caused by unexpected guest frame numbers and roles, and an XFS filesystem data corruption issue involving reflink operations. These flaws could lead to memory corruption or data integrity problems. Red Hat has released updated kernel packages to address these vulnerabilities. The advisory rates the security impact as Important (high severity) and requires rebooting the system after applying the update.
Potential Impact
Successful exploitation of the KVM use-after-free vulnerabilities could cause memory corruption, potentially leading to system instability or privilege escalation within virtualized environments. The XFS reflink issue could result in data corruption on affected filesystems. These impacts affect the integrity and stability of systems running the vulnerable kernel versions.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the available kernel updates for Red Hat Enterprise Linux 8.8 as described in the Red Hat advisory (RHSA-2026:41229) and reboot their systems to ensure the fixes take effect. Patch status is confirmed as official-fix by Red Hat.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-46113
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a19fec3e29bf47b500fe082
Added to database: 05/29/2026, 21:01:55 UTC
Last enriched: 07/30/2026, 14:47:43 UTC
Last updated: 08/31/2026, 10:52:09 UTC
Views: 153
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.