CVE-2026-59843

6.5 Moyenne

Publiée le 21/07/2026 à 14:18 · Modifiée le 01/09/2026 à 23:18 · Modifiée · Source : secalert@redhat.com

Description

A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.

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Produits concernés

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Hardened Images
Libssh libssh
Redhat hardened images
Redhat enterprise linux

Scores CVSS

Version	Score	Source	Vecteur
3.1	6.5 Moyenne	secalert@redhat.com	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`

Faiblesses (CWE)

CWE-835
CWE-400

Références

https://access.redhat.com/errata/RHSA-2026:42922 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:55855
https://access.redhat.com/errata/RHSA-2026:62217
https://access.redhat.com/errata/RHSA-2026:62218
https://access.redhat.com/security/cve/CVE-2026-59843 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2498176 Issue TrackingVendor Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories