| Name | CVE-2026-5367 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1134486 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ovn (PTS) | bookworm | 23.03.1-1~deb12u2 | vulnerable |
| trixie | 25.03.0-1 | vulnerable |
| forky, sid | 26.03.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| ovn | source | (unstable) | 26.03.0-4 | | | 1134486 |
Notes
[trixie] - ovn <no-dsa> (Minor issue)
[bookworm] - ovn <postponed> (Minor issue; bounded heap over-read/possible crash in pinctrl DHCPv6 handling, fix is a large parsing refactor)
https://www.openwall.com/lists/oss-security/2026/04/20/3
Fixed by: https://github.com/ovn-org/ovn/commit/78f6ce612403d6343f1e3782cbfff691d411dee4 (v26.03.1)