CVE-2025-30211: high-severity vulnerability in erlang otp
KEX init error results with excessive memory usage
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
erlang · otpRelated CVEs — erlang otp
In the same product, most dangerous first.
CVE-2025-32433CRITICALErlang/OTP SSH Vulnerable to Pre-Authentication RCEEPSS 98.9%KEVCVE-2025-46712LOWErlang/OTP SSH Has Strict KEX ViolationsEPSS 0.5%CVE-2025-26618HIGHSSH SFTP packet size not verified properly in Erlang OTPEPSS 0.5%CVE-2024-53846MEDIUMssl fails to validate incorrect extened key usageEPSS 0.3%