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CVE-2026-6679

A heap buffer overflow could occur in the DTLS 1.3 ACK serialization path before the connecting peer is authenticated. The buffer overflow was due to an integer truncation when computing the length of the ACK record-number list, causing an undersized buffer to be allocated and then overrun. This affects builds using DTLS 1.3 and wolfSSL version 5.9.0 and earlier. A fix was added to the 5.9.1 release.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:70b1b471504a932d3eeb46dc2c75748cc0b77249160ae7a71388c622e4040d8e
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-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/problemTypes/0/descriptions/1

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-197","description":"CWE-197 Numeric Truncation Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/problemTypes/0/descriptions/2

Affected products and versions

1 source assertion
{"collectionURL":"https://github.com/wolfSSL/wolfssl","defaultStatus":"unaffected","product":"wolfSSL","vendor":"wolfSSL","versions":[{"lessThanOrEqual":"5.9.0","status":"affected","version":"5.4.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.8,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/problemTypes/0/descriptions/1
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-197","description":"CWE-197 Numeric Truncation Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/problemTypes/0/descriptions/2

Source references

2 source assertions
{"tags":["patch"],"url":"https://github.com/wolfSSL/wolfssl/pull/10116"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/references/0
{"url":"https://www.wolfssl.com/docs/security-vulnerabilities/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1c4c7e65f6275cf2eebb33b1dc8d8db18b91f0ae656b63b9197f3b3326a1f305 · sha256:5dfcd5cde75cb613… · /containers/cna/references/1

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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