CVE-2026-0966
Libssh: libssh: denial of service via zero-length input in ssh_get_hexa()
Description
A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:LIntegrityLow
A:HAvailabilityHigh
Weaknesses
Affected Products
Red Hat Inc.
commercial·USaka redhat, Red Hat
libssh
oss-projectaka libssh2 (related, sometimes confused)
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
АО «ИВК»
commercial·RUaka ivk
ООО «Ред Софт»
commercial·RUaka red soft
АО «СберТех»
commercial·RUaka ao sbertech, сбертех
and 8 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
References
https://access.redhat.com/errata/RHSA-2026:18160
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:18683
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:7067
access.redhat.com
and 9 more references View all →
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