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: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-46300) * kernel: Read root-owned files as an unprivileged user (CVE-2026-46333) 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
This advisory covers a kernel security update for Red Hat Enterprise Linux 9.6 that fixes two main vulnerabilities: CVE-2026-46300, a local privilege escalation vulnerability caused by a variant of the Dirty Frag issue in the ESP/XFRM subsystem, and CVE-2026-46333, which allows unprivileged users to read files owned by root. The kernel is the core component of the Linux operating system, and these vulnerabilities could allow attackers with local access to escalate privileges or access sensitive files. The update is rated as Important by Red Hat Product Security and addresses these issues by patching the kernel packages. A system reboot is required to apply the fixes.
Potential Impact
Successful exploitation of CVE-2026-46300 could allow a local attacker to escalate privileges to root, compromising system integrity and control. CVE-2026-46333 could enable an unprivileged user to read files owned by root, potentially exposing sensitive information. Both vulnerabilities affect the confidentiality, integrity, and availability of the system. The CVSS vector for CVE-2026-43503 indicates high impact on confidentiality, integrity, and availability with low attack complexity but requiring local privileges.
Mitigation Recommendations
A security update for the Linux kernel is available for Red Hat Enterprise Linux 9.6 Extended Update Support. Users should apply the update as described in the Red Hat advisory (https://access.redhat.com/articles/11258) and reboot their systems to ensure the fixes take effect. No alternative mitigations are indicated; applying the official patch and rebooting is required to remediate these vulnerabilities.
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: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-46300) * kernel: Read root-owned files as an unprivileged user (CVE-2026-46333) 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.
CVSS v3.1
Score 8.8high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers a kernel security update for Red Hat Enterprise Linux 9.6 that fixes two main vulnerabilities: CVE-2026-46300, a local privilege escalation vulnerability caused by a variant of the Dirty Frag issue in the ESP/XFRM subsystem, and CVE-2026-46333, which allows unprivileged users to read files owned by root. The kernel is the core component of the Linux operating system, and these vulnerabilities could allow attackers with local access to escalate privileges or access sensitive files. The update is rated as Important by Red Hat Product Security and addresses these issues by patching the kernel packages. A system reboot is required to apply the fixes.
Potential Impact
Successful exploitation of CVE-2026-46300 could allow a local attacker to escalate privileges to root, compromising system integrity and control. CVE-2026-46333 could enable an unprivileged user to read files owned by root, potentially exposing sensitive information. Both vulnerabilities affect the confidentiality, integrity, and availability of the system. The CVSS vector for CVE-2026-43503 indicates high impact on confidentiality, integrity, and availability with low attack complexity but requiring local privileges.
Mitigation Recommendations
A security update for the Linux kernel is available for Red Hat Enterprise Linux 9.6 Extended Update Support. Users should apply the update as described in the Red Hat advisory (https://access.redhat.com/articles/11258) and reboot their systems to ensure the fixes take effect. No alternative mitigations are indicated; applying the official patch and rebooting is required to remediate these vulnerabilities.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-43503
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a175f05e29bf47b50edf863
Added to database: 05/27/2026, 21:15:49 UTC
Last enriched: 07/10/2026, 12:51:05 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 85
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