Malicious Key Exchange Messages may Lead to Excessive Resource Consumption
## Summary Uncontrolled Resource Consumption vulnerability in Erlang OTP ssh (ssh\_sftp modules) allows Excessive Allocation, Flooding. This vulnerability is associated with program files lib/ssh/src/ssh\_sftpd.erl. This issue affects OTP from OTP 17.0 before OTP 28.0.3, OTP 27.3.4.3 and OTP 26.2.5.15, corresponding to ssh from 3.0.1 before 5.3.3, 5.2.11.3 and 5.1.4.12. ## Workarounds \* set option parallel\_login to false \* reduce max\_sessions option
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-48040US | — | — | ||
Uncontrolled Resource Consumption vulnerability in Erlang OTP ssh (ssh_sftp modules) allows Excessive Allocation, Flooding. This vulnerability is associated with program files lib/… | ||||
references
External citations — patches, advisories, analysis.
- https://cna.erlef.org/cves/CVE-2025-48040.htmlWEB
- https://github.com/erlang/otp/commit/548f1295d86d0803da884db8685cc16d461d0d5aFIX
- https://github.com/erlang/otp/commit/7cd7abb7e19e16b027eaee6a54e1f6fbbe21181aFIX
- https://github.com/erlang/otp/pull/10162FIX
- https://github.com/erlang/otp/security/advisories/GHSA-h7rg-6rjg-4cphADVISORY
- https://www.erlang.org/doc/system/versions.html#order-of-versionsWEB
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