CVE-2025-5351

Libssh: double free vulnerability in libssh key export functions

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.

Remediation

Workaround:

  • Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Administrators should apply vendor-supplied patches as soon as they become available.

Category

4.2
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat OpenShift Container Platform 4
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2025-5351 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2369367 issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-5351?
CVE-2025-5351 has been scored as a medium severity vulnerability.
How to fix CVE-2025-5351?
As a workaround for remediating CVE-2025-5351: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Administrators should apply vendor-supplied patches as soon as they become available.
Is CVE-2025-5351 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-5351 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-5351?
CVE-2025-5351 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat OpenShift Container Platform 4.
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