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OFFICIAL CVE RECORD4.3 Medium

CVE-2026-55653

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

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
redhat

Description

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).

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:9.9p1-25.el10_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

Default version status: affected

  • 0:9.9p1-7.el10_0.5 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:8.0p1-30.el8_10 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:8.0p1-30.el8_10 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:9.9p1-9.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:9.9p1-9.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Default version status: affected

  • 0:8.7p1-30.el9_2.13 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Default version status: affected

  • 0:8.7p1-38.el9_4.10 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support

Default version status: affected

  • 0:8.7p1-45.el9_6.5 to < *unaffected

Red Hat Red Hat Hardened Images

Default version status: affected

  • 10.3p1-6.hum1 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1791818590 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1791818589 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1791818505 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1791818496 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1791818502 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1793042072 to < *unaffected

Red Hat Red Hat OpenShift AI 3.2

Default version status: affected

  • 1791818602 to < *unaffected

Red Hat Red Hat OpenShift AI 3.2

Default version status: affected

  • 1791818598 to < *unaffected

Red Hat Red Hat OpenShift AI 3.2

Default version status: affected

  • 1791818512 to < *unaffected

Red Hat Red Hat OpenShift AI 3.2

Default version status: affected

  • 1791818587 to < *unaffected

Red Hat Red Hat OpenShift AI 3.2

Default version status: affected

  • 1791818778 to < *unaffected

Red Hat Red Hat OpenShift AI 3.2

Default version status: affected

  • 1791818512 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818782 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818782 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818627 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818790 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818874 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818792 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818662 to < *unaffected

Red Hat Red Hat OpenShift AI 3.3

Default version status: affected

  • 1791818877 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791883722 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791881612 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791885618 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791881487 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791881732 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791883315 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791881486 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791881769 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1791885505 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791819252 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791818749 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791819206 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791818979 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791819123 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791818901 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791820333 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791819495 to < *unaffected

Red Hat Red Hat OpenShift AI 3.5

Default version status: affected

  • 1791819104 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1786435483 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1786533529 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787135742 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787241260 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: affected

Red Hat Red Hat Enterprise Linux 7

Default version status: affected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: affected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: affected

References