CVE detail
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).
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 16.1 · diversity 15.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 1
- within the 30d window
- Peak daily
- 1
- highest bucket
Evidence
Source links by recency
4 source links · newest first
Information published.
vendormsrc.microsoft.comJun 28, 2026, 9:01 AM- https://bugzilla.redhat.com/show_bug.cgi?id=2462351bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comJun 23, 2026, 4:17 AM - https://access.redhat.com/security/cve/CVE-2026-55653access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comJun 23, 2026, 4:17 AM - https://access.redhat.com/errata/RHSA-2026:36759access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comJun 23, 2026, 4:17 AM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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