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
This advisory covers two security issues in OVN, a system supporting virtual network abstraction. CVE-2026-5265 is a heap over-read vulnerability occurring during ICMP error response generation, which could lead to memory safety issues. CVE-2026-5367 involves information disclosure triggered by crafted DHCPv6 packets. Both vulnerabilities affect the ovn25.03 Fast Datapath packages for Red Hat Enterprise Linux 9. The vendor has released updated packages to address these issues.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) may cause memory safety issues potentially leading to crashes or information leakage. The information disclosure vulnerability (CVE-2026-5367) allows an attacker to gain unauthorized access to information via crafted DHCPv6 packets. Both issues compromise the security of virtual network abstractions managed by OVN, potentially impacting confidentiality and stability of affected systems.
Mitigation Recommendations
Red Hat has released updated ovn25.03 packages for Fast Datapath on Red Hat Enterprise Linux 9 that fix these vulnerabilities. Users should apply these official updates as detailed in the Red Hat advisory RHSA-2026:11701. Patch status is confirmed with official fixes available. No additional mitigation steps are indicated beyond applying the vendor-provided updates.
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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security issues in OVN, a system supporting virtual network abstraction. CVE-2026-5265 is a heap over-read vulnerability occurring during ICMP error response generation, which could lead to memory safety issues. CVE-2026-5367 involves information disclosure triggered by crafted DHCPv6 packets. Both vulnerabilities affect the ovn25.03 Fast Datapath packages for Red Hat Enterprise Linux 9. The vendor has released updated packages to address these issues.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) may cause memory safety issues potentially leading to crashes or information leakage. The information disclosure vulnerability (CVE-2026-5367) allows an attacker to gain unauthorized access to information via crafted DHCPv6 packets. Both issues compromise the security of virtual network abstractions managed by OVN, potentially impacting confidentiality and stability of affected systems.
Mitigation Recommendations
Red Hat has released updated ovn25.03 packages for Fast Datapath on Red Hat Enterprise Linux 9 that fix these vulnerabilities. Users should apply these official updates as detailed in the Red Hat advisory RHSA-2026:11701. Patch status is confirmed with official fixes available. No additional mitigation steps are indicated beyond applying the vendor-provided updates.
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: 05/29/2026, 21:01:49 UTC
Last enriched: 06/28/2026, 00:51:01 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 49
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