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CVE-2026-11604

An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:073656c8846acfc0de9feb0ae60125e3554f97b3dec47bd143cc7c87ab175877
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-131","description":"CWE-131 Incorrect calculation of buffer size","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-122","description":"CWE-122 Heap-based buffer overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Windows"],"product":"ovpn-dco-win","vendor":"OpenVPN","versions":[{"lessThanOrEqual":"2.5.8","status":"affected","version":"2.0.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":5.6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImp…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-131","description":"CWE-131 Incorrect calculation of buffer size","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-122","description":"CWE-122 Heap-based buffer overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"tags":["vendor-advisory"],"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-11604"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/references/1
{"tags":["product"],"url":"https://github.com/OpenVPN/ovpn-dco-win/releases"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:51f175da6336aa5c57bc347ed708e275f04499ec011c6d28c59a1b9d346e41bd · sha256:6e3a1af0395348ad… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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