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CVE-2026-15370

Libssh: libssh: stack buffer overflow in sftp server longname construction

Published: Jul 21, 2026Updated: Jul 30, 2026 Sources: CVE List NVDCWE-121
6.7MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 94.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-121

Affected Products

Red Hat
commercial·USaka redhat
hardened imagesOn-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Hardened ImagesOn-premOS
Operating Systems / linux-distro
libssh
oss-projectaka libssh2 (related, sometimes confused)
libsshLibrary
OSS Libraries / generic-library
and 3 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:47768
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-15370
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2499049
bugzilla.redhat.com

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