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 (Open Virtual Network) provides virtual network abstraction capabilities complementing Open vSwitch. Two vulnerabilities have been fixed in ovn23.06: a heap over-read in ICMP error response generation (CVE-2026-5265) and an information disclosure vulnerability triggered by crafted DHCPv6 packets (CVE-2026-5367). These vulnerabilities impact Red Hat Enterprise Linux Fast Datapath 8 implementations of ovn23.06. Red Hat has released updated packages to remediate these issues as detailed in advisory RHSA-2026:11695.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) could lead to potential memory corruption or crashes during ICMP error response generation. The information disclosure vulnerability (CVE-2026-5367) allows an attacker to gain unauthorized access to information via specially crafted DHCPv6 packets. Both issues compromise the security of virtual network abstractions managed by OVN, potentially affecting network isolation and confidentiality.
Mitigation Recommendations
Red Hat has released updated ovn23.06 packages as part of the Fast Datapath for Red Hat Enterprise Linux 8 to address these vulnerabilities. Users should apply the security update described in Red Hat advisory RHSA-2026:11695 promptly. Detailed update instructions are available at https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified; applying the official patch is the recommended remediation.
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
OVN (Open Virtual Network) provides virtual network abstraction capabilities complementing Open vSwitch. Two vulnerabilities have been fixed in ovn23.06: a heap over-read in ICMP error response generation (CVE-2026-5265) and an information disclosure vulnerability triggered by crafted DHCPv6 packets (CVE-2026-5367). These vulnerabilities impact Red Hat Enterprise Linux Fast Datapath 8 implementations of ovn23.06. Red Hat has released updated packages to remediate these issues as detailed in advisory RHSA-2026:11695.
Potential Impact
The heap over-read vulnerability (CVE-2026-5265) could lead to potential memory corruption or crashes during ICMP error response generation. The information disclosure vulnerability (CVE-2026-5367) allows an attacker to gain unauthorized access to information via specially crafted DHCPv6 packets. Both issues compromise the security of virtual network abstractions managed by OVN, potentially affecting network isolation and confidentiality.
Mitigation Recommendations
Red Hat has released updated ovn23.06 packages as part of the Fast Datapath for Red Hat Enterprise Linux 8 to address these vulnerabilities. Users should apply the security update described in Red Hat advisory RHSA-2026:11695 promptly. Detailed update instructions are available at https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified; applying the official patch is the recommended remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:11695
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-5367"]
- Cvss Version
- null
Threat ID: 6a19febde29bf47b500fd764
Added to database: 05/29/2026, 21:01:49 UTC
Last enriched: 06/28/2026, 00:51:30 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 68
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.