MEDIUMVulnerability
CVE-2026-55653
A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange (DH-GEX) client path. This occurs during FIPS (Federal Information Processing Standards) mode known-group validation when the client processes attacker-controlled DH-GEX group parameters. Successful exploitation leads to client-side process termination, resulting in a Denial of Service (DoS).
Properties
- severity
- MEDIUM
- score
- 4.3
- cve_id
- CVE-2026-55653
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- published_at
- 2026-06-23T04:17:36.600
- last_modified
- 2026-08-12T16:17:06.963
Related Entities (10)
HAS_WEAKNESS (1)
→[Weakness]Double Free
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (8)
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