Red Hat Security Advisory: ovn25.03 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 in Red Hat Enterprise Linux Fast Datapath 9, contains two vulnerabilities: a heap over-read in ICMP error response generation (CVE-2026-5265) and an information disclosure vulnerability via crafted DHCPv6 packets (CVE-2026-5367). These vulnerabilities could potentially lead to security issues such as memory corruption or unintended information exposure. Red Hat has released an important security update (RHSA-2026:11701) that addresses these vulnerabilities across multiple hardware architectures. The advisory references the CVE pages for detailed impact and scoring information, but no CVSS scores are provided in the advisory itself.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) may cause memory to be read beyond its intended bounds during ICMP error response generation, potentially leading to application instability or information leakage. The information disclosure vulnerability (CVE-2026-5367) allows crafted DHCPv6 packets to expose sensitive information. Both vulnerabilities affect the OVN component in Red Hat Enterprise Linux Fast Datapath 9. No known active exploitation has been reported. The overall security impact is rated as Important by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released an official security update (RHSA-2026:11701) that addresses these vulnerabilities. Users of affected Red Hat Enterprise Linux Fast Datapath 9 versions should apply the provided ovn25.03-25.03.2-100.el9fdp security update packages as soon as possible. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory.
Red Hat Security Advisory: ovn25.03 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 in Red Hat Enterprise Linux Fast Datapath 9, contains two vulnerabilities: a heap over-read in ICMP error response generation (CVE-2026-5265) and an information disclosure vulnerability via crafted DHCPv6 packets (CVE-2026-5367). These vulnerabilities could potentially lead to security issues such as memory corruption or unintended information exposure. Red Hat has released an important security update (RHSA-2026:11701) that addresses these vulnerabilities across multiple hardware architectures. The advisory references the CVE pages for detailed impact and scoring information, but no CVSS scores are provided in the advisory itself.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) may cause memory to be read beyond its intended bounds during ICMP error response generation, potentially leading to application instability or information leakage. The information disclosure vulnerability (CVE-2026-5367) allows crafted DHCPv6 packets to expose sensitive information. Both vulnerabilities affect the OVN component in Red Hat Enterprise Linux Fast Datapath 9. No known active exploitation has been reported. The overall security impact is rated as Important by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released an official security update (RHSA-2026:11701) that addresses these vulnerabilities. Users of affected Red Hat Enterprise Linux Fast Datapath 9 versions should apply the provided ovn25.03-25.03.2-100.el9fdp security update packages as soon as possible. Detailed update instructions are available at https://access.redhat.com/articles/11258. No additional mitigation steps 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-2026:11701
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-5367"]
- Cvss Version
- null
Threat ID: 6a19febde29bf47b500fd73d
Added to database: 5/29/2026, 9:01:49 PM
Last enriched: 5/29/2026, 9:06:09 PM
Last updated: 5/31/2026, 5:00:45 AM
Views: 2
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