{"id":80943,"date":"2026-06-23T07:06:22","date_gmt":"2026-06-23T03:36:22","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/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\/"},"modified":"2026-06-23T07:06:22","modified_gmt":"2026-06-23T03:36:22","slug":"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","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/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\/","title":{"rendered":"CVE-2026-55653 &#8211; 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"},"content":{"rendered":"<p>CVE ID :CVE-2026-55653<\/p>\n<p>  Published : June 23, 2026, 3:36 a.m. | 2\u00a0hours, 7\u00a0minutes ago<\/p>\n<p>  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).<\/p>\n<p>  Severity: 4.3 | MEDIUM<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-55653 Published : June 23, 2026, 3:36 a.m. | 2\u00a0hours, 7\u00a0minutes ago 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 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-80943","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/80943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=80943"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/80943\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=80943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=80943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=80943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}