CVE-2026-42792: epmd permanent DoS via EMFILE on accept(2) in erts

CSIRTS triage

What

The epmd daemon can be permanently denied of service via EMFILE exhaustion on accept(2) in erts.

Who is affected

Systems running Erlang/OTP with epmd enabled.

Urgency

Moderate; unexploited but causes permanent service denial.

Action

Update to a patched Erlang/OTP version once available.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

unknown

Published

2026-08-06

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42792

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-427920.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[NEW] [high] Erlang/OTP: Multiple vulnerabilitiescert-bund
• unknownDSA-6464-1 erlang - security updatedebian
• unknownCVE-2026-42792: Improper Handling of Exceptional Conditions vulnerability in Erlang OTP erts (epmd) allows an …nvd

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