VULNERABILITY INTELLIGENCE
CVE-2025-8277
CVSS score3.1 LOW
EPSS probability0.43%
CISA KEVNot currently listed
Published2025-09-09
Last modified2026-10-18
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Description
A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when using libgcrypt, which impacts application stability and availability.
Weakness classification
- secalert@redhat.com: CWE-401