CVE-2026-75538

CVSS 8.2 (high) · published 2026-09-01

An attacker that connects to an open Erlang TCP port that uses the inet driver with {packet,4} mode can use a signed overflow in an incorrect packet length calculation to overflow the receive buffer into the VM allocator area and beyond up to about 2 GB. This would easily trash the allocated block's allocator metadata footer, and the next block, if any, and most likely cause the BEAM VM to crash. Utilizing this with precision enough to achieve Remote Code Execution would be extremely unfeasible. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, OTP 28.5.0.6, and OTP 29.0.6, corresponding to erts from 6.0 before 15.2.7.13, 16.4.0.6, and 17.0.6. Whether OTP before OTP 17.0, corresponding to erts before 6.0, is affected is unknown.

Weakness: CWE-122, CWE-190

Source: NVD CVE-2026-75538

References

• https://cna.erlef.org/cves/CVE-2026-75538.html
• https://github.com/erlang/otp/commit/08e8efdba8500d2d6f54c6b1de1492b228017c9b
• https://github.com/erlang/otp/security/advisories/GHSA-8m6r-2pj2-25pm
• https://osv.dev/vulnerability/EEF-CVE-2026-75538
• https://www.erlang.org/doc/system/versions.html#order-of-versions

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