CVE-2025-11624 Buffer overwrite when processing file handles with the SFTP server
A stack buffer overwrite in the wolfSSH SFTP server allows attackers to execute arbitrary code or cause denial of service via malicious packets.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-11624?
CVE-2025-11624 is a low-severity memory corruption vulnerability in wolfSSH, published on 21 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Potential stack buffer overwrite on the SFTP server side when receiving a malicious packet that has a handle size larger than the system handle or file descriptor size, but smaller than max handle size allowed.
Weakness: CWE-787
Which versions are affected by CVE-2025-11624?
It affects 1 product.
Products include Wolfssh Wolfssh.
How do I fix CVE-2025-11624?
No fix has been published for CVE-2025-11624 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-11624 being exploited?
There is no known exploitation of CVE-2025-11624 in the wild and no public exploit code.
Other vulnerabilities in wolfSSH
Sources
Also known as GHSA-547f-m8pf-r989.