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Vulnerabilities

Vulnerability · CVE-2025-4878

A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function.

Published Jul 22, 2025 · catalog updated Sep 1, 2026 · Red Hat Red Hat Enterprise Linux 9

Check this week

CVE-2025-4878 is not in CISA KEV. FIRST estimates a 21.00% chance of exploitation in the next 30 days. Check whether you run Red Hat Red Hat Enterprise Linux 9.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low3.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
21.00%
Remediation
Advisory link
Affected products
vendor Red Hat Red Hat Enterprise Linux 9 patch: 0:0.10.4-18.el9

A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.

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 Red Hat Enterprise Linux 9 patch: 0:0.10.4-18.el9patch: 0:0.10.4-18.el9

How to fix CVE-2025-4878

What to do

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

Should you patch?

CVE-2025-4878 is not in CISA KEV. FIRST estimates a 21.00% chance of exploitation in the next 30 days. Check whether you run Red Hat Red Hat Enterprise Linux 9.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat Enterprise Linux 9 patch: 0:0.10.4-18.el9 patch: 0:0.10.4-18.el9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 21.00%. 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 22, 2025 · EUVD

    Detected

    A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.

  2. Sep 1, 2026 · EUVD

    Updated

    A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.

Sources

  • CVE.orgVulnerability recordCVE-2025-4878

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-22335

    A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption

    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.