Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.
VOLERION
Volerion Security Research

NOT DEFERRED DATABASE

VULNERABILITIES

CVE-2026-28810 Details

Description

Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel (inet_res, inet_db modules) allows DNS Cache Poisoning. The built-in DNS resolver (inet_res) uses a sequential, process-global 16-bit transaction ID for UDP queries and does not implement source port randomization. Response validation relies almost entirely on this ID, making DNS cache poisoning practical for an attacker who can observe one query or predict the next ID. This conflicts with RFC 5452 recommendations for mitigating forged DNS answers. inet_res is intended for use in trusted network environments and with trusted recursive resolvers. Earlier documentation did not clearly state this deployment assumption, which could lead users to deploy the resolver in environments where spoofed DNS responses are possible. This vulnerability is associated with program files lib/kernel/src/inet_db.erl and lib/kernel/src/inet_res.erl. This issue affects OTP from OTP 17.0 before OTP 28.4.2, OTP 27.3.4.10 and OTP 26.2.5.19, corresponding to kernel from 3.0 before 10.6.2, 10.2.7.4 and 9.2.4.11.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:3.7 LOWVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://cna.erlef.org/cves/CVE-2026-28810.html EEFThird Party Advisory
https://github.com/erlang/otp/commit/36f23c9d2cc54afe83671dd7343596d7972839a5 EEFPatch
https://github.com/erlang/otp/commit/b057a9d995017b1be50d6dc02edd52382f3231b8 EEFPatch
https://github.com/erlang/otp/commit/dd15e8eb03548c5e55e9915f0e91389ec6bad9fd EEFPatch
https://github.com/erlang/otp/security/advisories/GHSA-v884-5jg5-whj8 EEFVendor Advisory

see all 7 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-340Generation of Predictable Numbers or IdentifiersEEF

Affected Products

ProductVersions
erlang erlang/otp
>= 17.0, < 26.2.5.19
>= 27.0, < 27.3.4.10
>= 28.0, < 28.4.2

CPE

  • cpe:2.3:a:erlang:erlang/otp:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-28810
NVD Published Date:
Apr 7, 2026
NVD Last Modified:
Jul 24, 2026
Source:
EEF
CVE-2026-28810 Details - Not Deferred