CVE-2025-8277
Published: Sep 9, 2025
Modified: May 19, 2026
CVSS v3.1
3.1
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.
| Vendor | Product | Versions |
|---|---|---|
Unknown | libssh | affected 0.6.0 - < 0.11.3 |
Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-18.el9 - < * |
Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:0.10.4-18.el9 - < * |
Red Hat | Red Hat Enterprise Linux 10 | All versions |
Red Hat | Red Hat Enterprise Linux 6 | All versions |
Red Hat | Red Hat Enterprise Linux 7 | All versions |
Red Hat | Red Hat Enterprise Linux 8 | All versions |
Red Hat | Red Hat OpenShift Container Platform 4 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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