CVE record · CVE-2026-55950

DTLS listener crash via race condition in dtls_packet_demux causes denial of service for all sessions

CVSS 8.7 HighEPSS 0.0038 · 32nd percentile

Published by the CVE Program (CNA: EEF) at 2 Jul 2026, 16:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Erlang	OTP Package name: ssl pkg:otp/ssl?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git	affected 10.9 to before * otp Other versions: unaffected
Erlang	OTP Package name: erlang/otp https://github.com pkg:github/erlang/otp	affected 25.3 to before * otp affected 44dcb4c3d900777493ce2a6129f451aa475811f9 to before e44d2bf01c4473ef2ea7f09e3523cf96de6e4a04 git Other versions: unaffected

Identifiers: CVE-2026-55950
CNA: EEF
Weakness (CWE): CWE-367
Tags: Erlang OTP
Race condition
Published: 2 Jul 2026
Updated: 24 Jul 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0038, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 2 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/erlang/otp/security/advisories/GHSA-hwfc-5hf4-gvr3 vendor-advisoryrelated
cna.erlef.org/cves/CVE-2026-55950.html related
osv.dev/vulnerability/EEF-CVE-2026-55950 related
www.erlang.org/doc/system/versions.html#order-of-versions version-scheme
github.com/erlang/otp/commit/e44d2bf01c4473ef2ea7f09e3523cf96de6e4a04 patch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.