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CVE-2026-55653

Опубликовано: 23 июн. 2026
Источник: ubuntu
Приоритет: medium
CVSS3: 4.3

Описание

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).

РелизСтатусПримечание
devel

not-affected

see notes
esm-infra-legacy/trusty

needs-triage

esm-infra-legacy/xenial

needs-triage

esm-infra/bionic

needs-triage

esm-infra/focal

needs-triage

fips-preview/jammy

needs-triage

fips-updates/bionic

needs-triage

fips-updates/focal

needs-triage

fips-updates/jammy

needs-triage

fips-updates/noble

needs-triage

Показывать по

РелизСтатусПримечание
devel

ignored

esm-apps/bionic

ignored

esm-apps/focal

ignored

esm-apps/jammy

ignored

esm-apps/noble

ignored

esm-apps/resolute

ignored

jammy

ignored

noble

ignored

questing

ignored

resolute

ignored

Показывать по

4.3 Medium

CVSS3

Связанные уязвимости

CVSS3: 4.3
redhat
около 1 месяца назад

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).

CVSS3: 4.3
nvd
около 1 месяца назад

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).

msrc
около 1 месяца назад

Openssh: double free in red hat enterprise linux versions of openssh dh-gex client path during fips known-group validation leads to client-side denial of service

CVSS3: 4.3
debian
около 1 месяца назад

A flaw was found in OpenSSH. A malicious SSH server can exploit a doub ...

CVSS3: 4.3
github
около 1 месяца назад

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).

4.3 Medium

CVSS3