Lucene search
+L

CVE-2026-63566 DTLS handshake reassembler allocates buffer from unchecked 24-bit length

🗓️ 02 Oct 2026 06:57:21Reported by bcorgType 
cvelist
 cvelist
🔗 www.cve.org👁 55 Views

Unauthenticated DoS in Bouncy Castle bc-csharp via memory exhaustion in DTLS reassembler.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-63566
2 Oct 202607:47
–circl
cve
CVE
CVE-2026-63566
2 Oct 202606:57
–cve
euvd
EUVD
EUVD-2026-91217
2 Oct 202606:57
–euvd
kitploit
Kitploit
Anthropic-Credited-CVEs — Updated!
3 Sep 202601:25
–kitploit
mend
Mend
CVE-2026-63566
2 Oct 202606:57
–mend
nvd
NVD
CVE-2026-63566
2 Oct 202607:16
–nvd
ptsecurity
Positive Technologies
PT-2026-104104
2 Oct 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-63566: Memory Allocation with Excessive Size Value
2 Oct 202600:00
–rapid7
snyk
Snyk
Memory Allocation with Excessive Size Value
2 Oct 202608:23
–snyk
vulnrichment
Vulnrichment
CVE-2026-63566 DTLS handshake reassembler allocates buffer from unchecked 24-bit length
2 Oct 202606:57
–vulnrichment
[
  {
    "vendor": "Legion of the Bouncy Castle Inc.",
    "product": "bc-csharp",
    "collectionURL": "https://www.nuget.org/packages/BouncyCastle.Cryptography",
    "packageName": "BouncyCastle.Cryptography",
    "repo": "https://github.com/bcgit/bc-csharp",
    "programFiles": [
      "crypto/src/tls/DtlsReliableHandshake.cs",
      "crypto/src/tls/DtlsReassembler.cs"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.7.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation