6.3

CVE-2026-28810: erlang erlang\/otp

CVSS: 6.3v4.0MediumModified
AliasesUBUNTU-CVE-2026-28810DEBIAN-CVE-2026-28810
Published 07-04-2026Last modified 24-07-2026
Open JSON

Vulnerability summary

CVE-2026-28810 is a medium (CVSS 6.3) vulnerability in erlang erlang\/otp. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.3% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.41%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 5
OPENSUSE-SU-2026:10947-1OPENSUSE-SU-2026:20607-1SUSE-SU-2026:3579-1SUSE-SU-2026:3645-1USN-8901-1

Timeline

  1. 07-04-2026
    PublishedVulnerability first disclosed.
  2. 24-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.14 pp

From 0.27% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Erlang2 products
  • erlang\/otp≥ 17.0, < 26.2.5.19 | ≥ 27.0, < 27.3.4.10 | ≥ 28.0, < 28.4.2
  • otp≥ 3.0 (No fix recorded) | ≥ 17.0 (No fix recorded) | ≥ 07b8f441ca711f9812fad9e9115bab3c3aa92f79 (No fix recorded)
Debian1 product
  • erlangAll versions (No fix recorded) | < 1:27.3.4.1+dfsg-1+deb13u3 | < 1:27.3.4.10+dfsg-1
Ubuntu1 product
  • erlangAll versions (No fix recorded) | < 1:24.2.1+dfsg-1ubuntu0.8 | < 1:25.3.2.8+dfsg-1ubuntu4.8 | < 1:27.3.4.6+dfsg-1ubuntu0.2

3 vendors · 4 products

References

11 links
Show all 11 references