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Vulnerabilities

Vulnerability · CVE-2025-5351

A flaw was found in the key export functionality of libssh.

Published Jul 4, 2025 · catalog updated Sep 1, 2026 · Red Hat

Check this week

CVE-2025-5351 is not in CISA KEV. FIRST estimates a 62.00% chance of exploitation in the next 30 days. Check whether you run Red Hat.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
62.00%
Remediation
Version ranges on file
Affected products
vendor Red Hat libssh 0.10.0 <0.11.2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat libssh 0.10.0 <0.11.20.10.0 <0.11.2

How to fix CVE-2025-5351

  • Recommended remediation

    Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-5351 is not in CISA KEV. FIRST estimates a 62.00% chance of exploitation in the next 30 days. Check whether you run Red Hat.

Which versions are affected?

Compare what you have installed with Red Hat libssh 0.10.0 <0.11.2 0.10.0 <0.11.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 62.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 4, 2025 · EUVD

    Detected

    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 ins

  2. Sep 1, 2026 · EUVD

    Updated

    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 ins

Sources

  • EUVDVulnerability recordEUVD-2025-19935

    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 issu

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Sep 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.