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CVE-2025-5351

Libssh: double free vulnerability in libssh key export functions

Published: Jul 4, 2025Updated: May 19, 2026 Sources: CVE List NVD BDUCWE-415
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.5%
Top 61.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in the key export functionality of libssh. The issue occurs in the internal function responsible for converting cryptographic keys into serialized formats. During error handling, a memory structure is freed but not cleared, leading to a potential double free issue if an additional failure occurs later in the function. This condition may result in heap corruption or application instability in low-memory scenarios, posing a risk to system reliability where key export operations are performed.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-415

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
openSUSE TumbleweedNovell Inc.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container PlatformRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / container-orchestration
red hat inc.commercialUSOperating Systemsaka red hat
novell inc.commercialUSOperating Systems
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 15 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

http://www.slackware.com/security/viewer.php?l=slackware-security&y=2025&m=slackware-security.392586
slackware.com
https://www.libssh.org/security/advisories/CVE-2025-5351.txt
libssh.org
https://git.libssh.org/projects/libssh.git/commit/?id=6ddb730a27338983851248af59b128b995aad256
git.libssh.org
and 10 more references View all →

Timeline

Published
Jul 4, 2025
Last Updated
May 19, 2026

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