PT-2026-51471 · Red Hat · Red Hat Enterprise Linux 10+6

Publicado 2026-06-23 · Atualizado 2026-06-23 · CVE-2026-55653

Mitre

CVSS v3.1

4.3

Média

Vetor base

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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).

Correção

Double Free

Enumeração de Fraquezas

CWE-415

Identificadores relacionados

CVE-2026-55653

Produtos afetados

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Red Hat Hardened Images

Red Hat Openshift Container Platform 4

Referências · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-55653 · Nota de Segurança
• https://bugzilla.redhat.com/show_bug.cgi?id=2462351 · Nota
• https://access.redhat.com/security/cve/CVE-2026-55653 · Nota