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CVE-2025-65495

Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:62d86293c9aa1e160091edd88a82b07b365bb98835509a1571514e03a7e422cc
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-195","description":"CWE-195 Signed to Unsigned Conversion Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-195","description":"CWE-195 Signed to Unsigned Conversion Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"https://github.com/obgm/libcoap/issues/1744"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /containers/cna/references/0
{"url":"https://github.com/obgm/libcoap/pull/1750"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:daf2f9f874b4963fa952cee0c6eb7344bd0a1e484814692249699ed4f662eaeb · sha256:9d5098b7178e3c49… · /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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