Vulnerability Description
A flaw was found in the SFTP server message decoding logic of libssh. The issue occurs due to an incorrect packet length check that allows an integer overflow when handling large payload sizes on 32-bit systems. This issue leads to failed memory allocation and causes the server process to crash, resulting in a denial of service.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libssh | Libssh | 0.11.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2025-5449Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2369705Issue TrackingThird Party Advisory
- https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=261612179f74Patch
- https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=3443aec90188Patch
- https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=5504ff405154Patch
- https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=78485f446af9Patch
- https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=f79ec51b7fd5Patch
- https://www.libssh.org/security/advisories/CVE-2025-5449.txtThird Party Advisory
FAQ
What is CVE-2025-5449?
CVE-2025-5449 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A flaw was found in the SFTP server message decoding logic of libssh. The issue occurs due to an incorrect packet length check that allows an integer overflow when handling large payload sizes on 32-b...
How severe is CVE-2025-5449?
CVE-2025-5449 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-5449?
Check the references section above for vendor advisories and patch information. Affected products include: Libssh Libssh.