CVE-2026-15370
During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.17% probability · 6th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-121
- Affected
- 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 · redhat/enterprise linux for power little endian eus
- Source
- secalert@redhat.com
EPSS 0.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2026:47768Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:55855Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-15370Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2499049Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.