CVE-2025-30211
Fixed in a distro release EPSS <1%CVSS 7.5
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.
Products: erlang otp
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 11 | erlang | 1:23.2.6+dfsg-1+deb11u2 |
| Debian 12 | erlang | 1:25.2.3+dfsg-1+deb12u1 |
| Debian 13 | erlang | 1:27.3.1+dfsg-1 |
| Debian 14 | erlang | 1:27.3.1+dfsg-1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | erlang26 | 26.2.1-150300.7.11.1 |
| Ubuntu 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.4 |
| Ubuntu 22.04 LTS | erlang | 1:24.2.1+dfsg-1ubuntu0.3 |
| Ubuntu 22.04 LTS | erlang | 1:24.2.1+dfsg-1ubuntu0.8 |
| Ubuntu 24.04 LTS | erlang | 1:25.3.2.8+dfsg-1ubuntu4.8 |
| Ubuntu 24.04 LTS | erlang | 1:25.3.2.8+dfsg-1ubuntu4.2 |
| Ubuntu 25.10 | erlang | 1:27.3+dfsg-1ubuntu1 |
| Ubuntu 26.04 LTS | erlang | 1:27.3.4.6+dfsg-1ubuntu0.2 |
| Ubuntu Pro 14.04 LTS | erlang | 1:16.b.3-dfsg-1ubuntu2.2+esm3 |
| Ubuntu Pro 16.04 LTS | erlang | 1:18.3-dfsg-1ubuntu3.1+esm4 |
| Ubuntu Pro 18.04 LTS | erlang | 1:20.2.2+dfsg-1ubuntu2+esm4 |
| Ubuntu Pro 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.5+esm3 |
| openSUSE Leap 15.6 | erlang26 | 26.2.1-150300.7.11.1 |