Bug 2355785 (CVE-2025-30211) - CVE-2025-30211 erlang: KEX init error results with excessive memory usage
Summary: CVE-2025-30211 erlang: KEX init error results with excessive memory usage
Keywords:
Status: NEW
Alias: CVE-2025-30211
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2356153 2356154 2356155 2356156
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-03-28 15:01 UTC by OSIDB Bzimport
Modified: 2025-03-31 13:05 UTC (History)
8 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-03-28 15:01:22 UTC 
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.
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