Is CVE-2025-30211 in the CISA KEV catalog?

No. CVE-2025-30211 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-30211?

CVE-2025-30211 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2025-30211?

CVE-2025-30211 has an EPSS score of 0.44% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-30211?

Upgrade erlang on debian 11 to 1:23.2.6+dfsg-1+deb11u2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2025-30211

HIGH

7.5

CVSS v3

NVD

Description

Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.1, 26.2.5.10, and 25.3.2.19, a maliciously formed KEX init message can result with high memory usage. Implementation does not verify RFC specified limits on algorithm names (64 characters) provided in KEX init message. Big KEX init packet may lead to inefficient processing of the error data. As a result, large amount of memory will be allocated for processing malicious data. Versions OTP-27.3.1, OTP-26.2.5.10, and OTP-25.3.2.19 fix the issue. Some workarounds are available. One may set option `parallel_login` to `false` and/or reduce the `max_sessions` option.

CWE-789

How to fix

Remediation Available

erlangDebian

Fixed in:1:23.2.6+dfsg-1+deb11u2CVE-2025-30211

Fixed in:1:25.2.3+dfsg-1+deb12u1CVE-2025-30211

Fixed in:1:27.3.1+dfsg-1CVE-2025-30211

erlangUbuntu

Fixed in:1:22.2.7+dfsg-1ubuntu0.4USN-7425-1

Fixed in:1:24.2.1+dfsg-1ubuntu0.3USN-7425-1

Fixed in:1:25.3.2.8+dfsg-1ubuntu4.2USN-7425-1

erlang-sshUbuntu

Fixed in:1:22.2.7+dfsg-1ubuntu0.4USN-7425-1

Fixed in:1:24.2.1+dfsg-1ubuntu0.3USN-7425-1

Fixed in:1:25.3.2.8+dfsg-1ubuntu4.2USN-7425-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.44%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-789 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2026-49975	High	7.5	11%	-	Fix
CVE-2025-27533	High	7.5	8.5%	-	Fix
CVE-2017-7651	High	7.5	5.3%	-	Fix
CVE-2021-31811	Medium	5.5	3.4%	-	-
CVE-2021-27906	Medium	5.5	3.3%	-	Fix

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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 2025-11-03.