CVE-2025-7209 9fans plan9port x509.c value_decode null pointer dereference
A local attacker can cause a denial of service via null pointer dereference in the x509.c library component of Plan9port.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-7209?
CVE-2025-7209 is a medium-severity vulnerability in 9fans plan9port, published on 9 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been found in 9fans plan9port up to 9da5b44 and classified as problematic. Affected by this vulnerability is the function value_decode in the library src/libsec/port/x509.c. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The identifier of the patch is deae8939583d83fd798fca97665e0e94656c3ee8. It is recommended to apply a patch to fix this issue.
Which versions are affected by CVE-2025-7209?
It affects 1 product.
Products include 9fans Plan9port.
How do I fix CVE-2025-7209?
No fix has been published for CVE-2025-7209 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-7209 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7209 exists.
Other vulnerabilities in 9fans plan9port
Sources
Also known as GHSA-v25m-v785-g666.