Bug 2346900 (CVE-2025-26618) - CVE-2025-26618 otp: erlang: SSH SFTP packet size not verified properly in Erlang OTP
Summary: CVE-2025-26618 otp: erlang: SSH SFTP packet size not verified properly in Erl...
Keywords:
Status: NEW
Alias: CVE-2025-26618
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-20 20:01 UTC by OSIDB Bzimport
Modified: 2025-04-22 01:00 UTC (History)
9 users (show)

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Description OSIDB Bzimport 2025-02-20 20:01:14 UTC 
Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.
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