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Affected Component
Analysis
libssh
Patched
Name
CVE-2026-59843
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.
Published Date
Updated Date
Workaround
-
Advisories
https://access.redhat.com/errata/RHSA-2026:42922Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-59843Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2498176Issue Tracking
Analysis#
Vulnerability Ratings#
6.5
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
libssh (yocto:scarthgap)
#
Title
Author
Resolve
1
CVE-2026-59843 channels: Fail when receiving max packet size
=?UTF-8?q?Pavol=20=C5=BD=C3=A1=C4=8Dik?= <pzacik@redhat.com>
CVE-2026-59843