A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.
CVE-2026-15370
CVSS base score
6.7 (v3.1)
Severity
MEDIUM
Attack vector
Local
Weakness
CWE-121
Last modified
November 5, 2026
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected products
libssh libssh
redhat hardened images
redhat enterprise linux
redhat enterprise linux for els
redhat enterprise linux for eus
redhat enterprise linux for ibm z systems
redhat enterprise linux for ibm z systems els
redhat enterprise linux for ibm z systems eus
redhat enterprise linux for power little endian
redhat enterprise linux for power little endian els
References
- access.redhat.com Vendor Advisory
- access.redhat.com Vendor Advisory
- access.redhat.com Vendor Advisory
- bugzilla.redhat.com Issue Tracking, Vendor Advisory