CVE-2025-0650 Ovn: egress acls may be bypassed via specially crafted udp packet
High 8.1
Published
Updated
Check this codebase for CVE-2025-0650 and fix it if it is affected.
What it is: CVE-2025-0650 is a high-severity vulnerability in Fast Datapath for Red Hat Enterprise Linux 8, published on 23 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-0650 in the wild and no public exploit code.
Affected product: Fast Datapath for Red Hat Enterprise Linux 8. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2025-0650/ (Markdown: https://insights.sbomify.com/CVE-2025-0650/index.md)
Attackers can bypass egress ACLs in OVN via crafted UDP packets on switches with DNS records, gaining unauthorized access to VMs and containers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-0650?
CVE-2025-0650 is a high-severity vulnerability in Fast Datapath for Red Hat Enterprise Linux 8, published on 23 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in the Open Virtual Network (OVN). Specially crafted UDP packets may bypass egress access control lists (ACLs) in OVN installations configured with a logical switch with DNS records set on it and if the same switch has any egress ACLs configured. This issue can lead to unauthorized access to virtual machines and containers running on the OVN network.
Weakness: CWE-284
Which versions are affected by CVE-2025-0650?
Linux distribution packages (40)
ovn22.03 Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-central Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-central-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-debugsource Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-host Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-host-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-vtep Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.03-vtep-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.03.7-11.el8fdp |
ovn22.06 Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-central Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-central-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-debugsource Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-host Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-host-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-vtep Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.06-vtep-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.06.0-273.el8fdp |
ovn22.09 Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-central Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-central-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-debugsource Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-host Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-host-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-vtep Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.09-vtep-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.09.2-86.el8fdp |
ovn22.12 Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-central Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-central-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-debugsource Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-host Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-host-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-vtep Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn22.12-vtep-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:22.12.1-107.el8fdp |
ovn23.03 Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:23.03.3-22.el8fdp |
ovn23.03-central Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:23.03.3-22.el8fdp |
ovn23.03-central-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:23.03.3-22.el8fdp |
ovn23.03-debuginfo Red Hat:enterprise_linux:8::fastdatapath | All versions | 0:23.03.3-22.el8fdp |
How do I fix CVE-2025-0650?
Apply the vendor's patch.
Is CVE-2025-0650 being exploited?
There is no known exploitation of CVE-2025-0650 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-0650, GHSA-gmx5-xv9g-ph7f, RHSA-2025:1083, RHSA-2025:1084, RHSA-2025:1085, RHSA-2025:1086 and 18 more.