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: net: openvswitch: Avoid releasing netdev before teardown completes (CVE-2026-31508) * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190) 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 two kernel vulnerabilities in Red Hat Enterprise Linux 9.4. CVE-2026-31508 addresses a flaw in the openvswitch network driver where the netdev object could be released prematurely before teardown completes, potentially leading to use-after-free conditions (CWE-367). CVE-2026-43190 addresses an issue in the netfilter xt_tcpmss module where the code did not properly check the remaining length before reading the optlen field, leading to an out-of-bounds read (CWE-125). Red Hat has released updated kernel packages that fix these issues. The update must be applied and the system rebooted for the fixes to take effect.
Potential Impact
The vulnerabilities affect the Linux kernel network components in Red Hat Enterprise Linux 9.4. They could potentially lead to memory corruption or out-of-bounds reads, which may impact system stability or security. The advisory rates the impact as moderate. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the available kernel update for Red Hat Enterprise Linux 9.4 and reboot their systems to ensure the fixes take effect. For detailed update instructions, refer to Red Hat's official article: https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor.
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: openvswitch: Avoid releasing netdev before teardown completes (CVE-2026-31508) * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190) 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
This advisory covers two kernel vulnerabilities in Red Hat Enterprise Linux 9.4. CVE-2026-31508 addresses a flaw in the openvswitch network driver where the netdev object could be released prematurely before teardown completes, potentially leading to use-after-free conditions (CWE-367). CVE-2026-43190 addresses an issue in the netfilter xt_tcpmss module where the code did not properly check the remaining length before reading the optlen field, leading to an out-of-bounds read (CWE-125). Red Hat has released updated kernel packages that fix these issues. The update must be applied and the system rebooted for the fixes to take effect.
Potential Impact
The vulnerabilities affect the Linux kernel network components in Red Hat Enterprise Linux 9.4. They could potentially lead to memory corruption or out-of-bounds reads, which may impact system stability or security. The advisory rates the impact as moderate. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the available kernel update for Red Hat Enterprise Linux 9.4 and reboot their systems to ensure the fixes take effect. For detailed update instructions, refer to Red Hat's official article: https://access.redhat.com/articles/11258. 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-2026:25028
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-43190"]
- Cvss Version
- null
Threat ID: 6a298f90c9170919df395e9e
Added to database: 6/10/2026, 4:23:44 PM
Last enriched: 6/10/2026, 4:33:34 PM
Last updated: 6/10/2026, 6:34:28 PM
Views: 8
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