UpHeron
All vulnerabilities

Servers and applications

CVE-2026-55950

Time-of-check Time-of-use (TOCTOU) race condition vulnerability in Erlang/OTP ssl (dtls_packet_demux module) allows an unauthenticated remote attacker to crash all active DTLS sessions on a listener. A DTLS server listener uses a single shared dtls_packet_demux gen_server process to route incoming UDP datagrams to the correct connection handler. When a DTLS client reconnects rapidly from the…

Severity
High 8.7
Published
2 Jul 2026
Last changed
24 Jul 2026
Added to UpHeron
16 Oct 2026
Fixed in
27.3.4.14, 28.5.0.3, 29.0.3
Sources
NVD

Affected software

SoftwareAffected versions
Erlang/OTPServers and applications · cpe:a:erlang:erlang\/otp
  • From 25.3 before 27.3.4.14
  • From 28.0 before 28.5.0.3
  • From 29.0 before 29.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-55950
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-55950