CVE-2025-8277

low

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2383888

https://access.redhat.com/security/cve/CVE-2025-8277

Details

Source: Mitre, NVD

Published: 2025-09-09

Updated: 2025-09-09

Risk Information

CVSS v2

Base Score: 2.1

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 3.1

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Severity: Low

EPSS

EPSS: 0.00039