Red Hat Security Advisory: ovn23.06 security update
OVN, the Open Virtual Network, is a system to support virtual network abstraction. OVN complements the existing capabilities of OVS to add native support for virtual network abstractions, such as virtual L2 and L3 overlays and security groups. Security Fix(es): * ovn: ovn: Heap Over-Read in ICMP Error Response Generation - security issue (CVE-2026-5265) * ovn: OVN: Information disclosure via crafted DHCPv6 packets (CVE-2026-5367) 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
OVN, a system supporting virtual network abstraction, has two security issues fixed in the ovn23.06 update for Red Hat Enterprise Linux Fast Datapath 9. CVE-2026-5265 is a heap over-read vulnerability occurring during ICMP error response generation, categorized under CWE-130. CVE-2026-5367 is an information disclosure vulnerability triggered by crafted DHCPv6 packets. Red Hat Product Security has rated the update as important and released patched packages for multiple architectures. The advisory references detailed CVE pages for further information. The vulnerabilities impact virtual network overlay and security group functionality provided by OVN.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) could lead to potential memory safety issues during ICMP error response processing, which might affect system stability or security. The information disclosure vulnerability (CVE-2026-5367) could allow an attacker to obtain sensitive information by sending crafted DHCPv6 packets. Both vulnerabilities affect network virtualization components in Red Hat Enterprise Linux Fast Datapath 9. No exploits are currently known in the wild, but the issues are rated as having high importance by Red Hat.
Mitigation Recommendations
Red Hat has released updated ovn23.06 packages addressing these vulnerabilities. Users should apply the security update RHSA-2026:11696 as soon as possible to remediate these issues. Detailed instructions and updated packages are available from the Red Hat advisory at https://access.redhat.com/errata/RHSA-2026:11696 and https://access.redhat.com/articles/11258. No additional mitigations are indicated by the vendor advisory.
Red Hat Security Advisory: ovn23.06 security update
Description
OVN, the Open Virtual Network, is a system to support virtual network abstraction. OVN complements the existing capabilities of OVS to add native support for virtual network abstractions, such as virtual L2 and L3 overlays and security groups. Security Fix(es): * ovn: ovn: Heap Over-Read in ICMP Error Response Generation - security issue (CVE-2026-5265) * ovn: OVN: Information disclosure via crafted DHCPv6 packets (CVE-2026-5367) 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.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OVN, a system supporting virtual network abstraction, has two security issues fixed in the ovn23.06 update for Red Hat Enterprise Linux Fast Datapath 9. CVE-2026-5265 is a heap over-read vulnerability occurring during ICMP error response generation, categorized under CWE-130. CVE-2026-5367 is an information disclosure vulnerability triggered by crafted DHCPv6 packets. Red Hat Product Security has rated the update as important and released patched packages for multiple architectures. The advisory references detailed CVE pages for further information. The vulnerabilities impact virtual network overlay and security group functionality provided by OVN.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) could lead to potential memory safety issues during ICMP error response processing, which might affect system stability or security. The information disclosure vulnerability (CVE-2026-5367) could allow an attacker to obtain sensitive information by sending crafted DHCPv6 packets. Both vulnerabilities affect network virtualization components in Red Hat Enterprise Linux Fast Datapath 9. No exploits are currently known in the wild, but the issues are rated as having high importance by Red Hat.
Mitigation Recommendations
Red Hat has released updated ovn23.06 packages addressing these vulnerabilities. Users should apply the security update RHSA-2026:11696 as soon as possible to remediate these issues. Detailed instructions and updated packages are available from the Red Hat advisory at https://access.redhat.com/errata/RHSA-2026:11696 and https://access.redhat.com/articles/11258. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:11696
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-5367"]
- Cvss Version
- null
Threat ID: 6a19febde29bf47b500fd75c
Added to database: 5/29/2026, 9:01:49 PM
Last enriched: 5/29/2026, 9:06:34 PM
Last updated: 5/31/2026, 4:10:21 AM
Views: 2
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