Is CVE-2024-39894 in the CISA KEV catalog?

No. CVE-2024-39894 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-39894?

CVE-2024-39894 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2024-39894?

CVE-2024-39894 has an EPSS score of 1.63% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-39894?

Upgrade openssh on debian 13 to 1:9.8p1-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2024-39894

HIGHEPSS 73th pctl

7.5

CVSS v3

NVD

Description

OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.

CWE-367TOCTOU Race Condition

How to fix

Remediation Available

opensshDebian

Fixed in:1:9.8p1-1CVE-2024-39894

opensshUbuntu

Fixed in:1:9.6p1-3ubuntu13.4USN-6887-1

openssh-clientUbuntu

Fixed in:1:9.6p1-3ubuntu13.4USN-6887-1

openssh-serverUbuntu

Fixed in:1:9.6p1-3ubuntu13.4USN-6887-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

1.63%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Other references12

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.