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
The Red Hat security advisory RHSA-2026:11696 addresses two vulnerabilities in ovn23.06, the Open Virtual Network system that supports virtual network abstractions. CVE-2026-5265 is a heap over-read vulnerability occurring during ICMP error response generation, classified under CWE-130. CVE-2026-5367 involves information disclosure through crafted DHCPv6 packets. Both vulnerabilities affect the Fast Datapath for Red Hat Enterprise Linux 9 across multiple architectures (x86_64, ppc64le, s390x, aarch64). The advisory provides updated ovn23.06 packages to fix these issues.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) could lead to memory safety issues in ICMP error response handling, potentially causing crashes or information leaks. The information disclosure vulnerability (CVE-2026-5367) allows an attacker to gain unauthorized information via crafted DHCPv6 packets. Both vulnerabilities could impact the confidentiality and stability of systems running affected versions of ovn23.06 on Red Hat Enterprise Linux Fast Datapath 9.
Mitigation Recommendations
Red Hat has released updated ovn23.06 packages for Fast Datapath on Red Hat Enterprise Linux 9 that address these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:11696 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat security advisory RHSA-2026:11696 addresses two vulnerabilities in ovn23.06, the Open Virtual Network system that supports virtual network abstractions. CVE-2026-5265 is a heap over-read vulnerability occurring during ICMP error response generation, classified under CWE-130. CVE-2026-5367 involves information disclosure through crafted DHCPv6 packets. Both vulnerabilities affect the Fast Datapath for Red Hat Enterprise Linux 9 across multiple architectures (x86_64, ppc64le, s390x, aarch64). The advisory provides updated ovn23.06 packages to fix these issues.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) could lead to memory safety issues in ICMP error response handling, potentially causing crashes or information leaks. The information disclosure vulnerability (CVE-2026-5367) allows an attacker to gain unauthorized information via crafted DHCPv6 packets. Both vulnerabilities could impact the confidentiality and stability of systems running affected versions of ovn23.06 on Red Hat Enterprise Linux Fast Datapath 9.
Mitigation Recommendations
Red Hat has released updated ovn23.06 packages for Fast Datapath on Red Hat Enterprise Linux 9 that address these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:11696 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
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: 05/29/2026, 21:01:49 UTC
Last enriched: 06/28/2026, 00:51:24 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 81
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