CVE-2026-75538
Publication date 1 September 2026
Last updated 28 September 2026
Ubuntu priority
Description
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, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to erts from 6.0 before 15.2.7.13, from 16.0 before 16.4.0.6, and from 17.0 before 17.0.6. Whether OTP before OTP 17.0, corresponding to erts before 6.0, is affected is unknown.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| erlang | 26.04 LTS resolute |
Fixed 1:27.3.4.6+dfsg-1ubuntu0.1
|
| 24.04 LTS noble |
Fixed 1:25.3.2.8+dfsg-1ubuntu4.7
|
|
| 22.04 LTS jammy |
Fixed 1:24.2.1+dfsg-1ubuntu0.7
|
|
| 20.04 LTS focal |
Fixed 1:22.2.7+dfsg-1ubuntu0.5+esm2
|
|
| 18.04 LTS bionic |
Fixed 1:20.2.2+dfsg-1ubuntu2+esm3
|
|
| 16.04 LTS xenial |
Fixed 1:18.3-dfsg-1ubuntu3.1+esm3
|
|
| 14.04 LTS trusty |
Fixed 1:16.b.3-dfsg-1ubuntu2.2+esm2
|
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CVSS version: CVSS v4.0
Base score
8.2 · High
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8827-1
- Erlang vulnerabilities
- 28 September 2026