Libssh Vulnerability in SFTP Servers Leading to Heap Memory Issues
CVE-2026-0968

3.1LOW

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
26 March 2026

What is CVE-2026-0968?

A vulnerability exists in libssh that allows a malicious SFTP server to exploit a flaw by sending a malformed 'longname' field in an SSH_FXP_NAME message during file listing operations. This oversight in checking for null values can trigger memory access violations, resulting in unexpected application behavior, crashes, or service interruptions due to potential denial of service (DoS). Attackers could leverage this weakness to execute specific payloads, heightening security risks for users engaged in secure file transfer.

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References

https://access.redhat.com/security/cve/CVE-2026-0968
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2436982
issue-trackingx_refsource_REDHAT
https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-...

CVSS V3.0

Score:
3.1
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Jakub Jelen (libssh) and nevv (CTyun Red-Shield Security Lab) for reporting this issue.
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