| Name | CVE-2025-30211 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4132-1, DSA-5906-1 |
| Debian Bugs | 1101713 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| erlang (PTS) | bullseye | 1:23.2.6+dfsg-1+deb11u1 | vulnerable |
| bullseye (security) | 1:23.2.6+dfsg-1+deb11u2 | fixed |
| bookworm | 1:25.2.3+dfsg-1 | vulnerable |
| bookworm (security) | 1:25.2.3+dfsg-1+deb12u1 | fixed |
| sid, trixie | 1:27.3.3+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://github.com/erlang/otp/security/advisories/GHSA-vvr3-fjhh-cfwc
https://github.com/erlang/otp/commit/df3aad2c5570847895562ff96a725190571f028c (OTP-25.3.2.19, OTP-26.2.5.10, OTP-27.3.1)
https://github.com/erlang/otp/commit/655e20a49ef80431e86ffb6c7f366d01fd4b64c3 (OTP-25.3.2.19, OTP-26.2.5.10, OTP-27.3.1)
https://github.com/erlang/otp/commit/d64d9fb0688092356a336e38a8717499113312a0 (OTP-25.3.2.19, OTP-26.2.5.10, OTP-27.3.1)
https://github.com/erlang/otp/commit/5ee26eb412a76ba1c6afdf4524b62939a48d1bce (OTP-25.3.2.19, OTP-26.2.5.10, OTP-27.3.1)