UpHeron
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Servers and applications

CVE-2026-84782

Issue summary: The DTLS retransmission logic does not correctly handle a handshake message write that is suspended part-way through. The retransmitted message can be read past the message buffer and the retransmission overwrites the internal state the suspended write needs to resume correctly. Impact summary: The retransmitted message can disclose a heap memory to the peer as plaintext handshake…

Severity
High 8.2
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 4.0.0 before 4.0.3
  • From 3.6.0 before 3.6.5
  • From 3.5.0 before 3.5.9
  • From 3.4.0 before 3.4.8
All 7 release lines
  • From 1.0.2 before 1.0.2zs
  • 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-2026-84782
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-84782