CVE catalog
CVE-2026-5367
A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cau
- Severity
- High · CVSS 8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.87% · Oct 25, 2026
A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ovn | sid | 26.03.1-1 | fixed |
| Debian | ovn | trixie | 25.03.0-1 | vulnerable |
| Debian | ovn | bookworm | 23.03.1-1~deb12u2 | vulnerable |
| Cpe | ovn | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ovn | source | sid | 26.03.0-4 | not yet assigned | Not reported | [1134486] |
| Debian | ovn | source | trixie | (unfixed) | not yet assigned | Not reported | [1134486] |
| Debian | ovn | source | bookworm | (unfixed) | not yet assigned | Not reported | [1134486] |
Notes
[trixie] ovn: Minor issue [bookworm] ovn: Minor issue; bounded heap over-read/possible crash in pinctrl DHCPv6 handling, fix is a large parsing refactor
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ovn-central]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-common]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-controller-vtep]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-doc]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· all · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· all · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-docker]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-host]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-ic]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
- [ovn-ic-db]Affected
Source package: [ovn]
Details (2)
23.03.1-1~deb12u2· amd64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
23.03.1-1~deb12u2· arm64 · bookwormAffected
nvd · ovn · debian · bookworm; nvd · ovn · debian · 12
[Debian 13 (Trixie)]
- [ovn-central]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
- [ovn-common]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
- [ovn-controller-vtep]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
- [ovn-doc]Affected
Source package: [ovn]
Details (2)
25.03.0-1· all · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· all · trixieAffected
nvd · ovn · debian · 13
- [ovn-docker]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
- [ovn-host]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
- [ovn-ic]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
- [ovn-ic-db]Affected
Source package: [ovn]
Details (2)
25.03.0-1· amd64 · trixieAffected
nvd · ovn · debian · 13
25.03.0-1· arm64 · trixieAffected
nvd · ovn · debian · 13
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/04/20/3]
- [http://www.openwall.com/lists/oss-security/2026/04/20/5]
- [https://access.redhat.com/errata/RHSA-2026:11694]
- [https://access.redhat.com/errata/RHSA-2026:11695]
- [https://access.redhat.com/errata/RHSA-2026:11696]
- [https://access.redhat.com/errata/RHSA-2026:11698]
- [https://access.redhat.com/errata/RHSA-2026:11700]
- [https://access.redhat.com/errata/RHSA-2026:11701]
- [https://access.redhat.com/errata/RHSA-2026:11702]
- [https://access.redhat.com/errata/RHSA-2026:22110]
- [https://access.redhat.com/errata/RHSA-2026:22111]
- [https://access.redhat.com/security/cve/CVE-2026-5367]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2455863]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_23188-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5367]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-5367]
- [https://security-tracker.debian.org/tracker/CVE-2026-5367]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5367.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1315.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]