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Servers and applications

CVE-2026-75806

Issue summary: An established DTLS 1.2 association using an AEAD cipher suite can be terminated by a single unauthenticated datagram whose encrypted fragment is shorter than the mandatory explicit IV and authentication tag overhead. Impact summary: An attacker who can send a datagram that is routed to an existing DTLS 1.2 association can tear that association down without knowing any key…

Severity
Medium 5.3
Published
29 Sept 2026
Last changed
8 Oct 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.1.1zj, 3.0.23, 3.4.8, 3.5.9, 3.6.5, 4.0.3
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • From 1.1.1 before 1.1.1zj
  • From 3.0.0 before 3.0.23
  • From 3.4.0 before 3.4.8
  • From 3.5.0 before 3.5.9
  • From 3.6.0 before 3.6.5
  • From 4.0.0 before 4.0.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-75806
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-75806