{"id":"CVE-2025-65495","aliases":["DEBIAN-CVE-2025-65495","EUVD-2025-198714","GHSA-vr3h-29qc-jvjf","UBUNTU-CVE-2025-65495","openSUSE-SU-2025:15780-1"],"status":"published","title":"Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5...","description":"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 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Tracking","report"]},{"url":"https://github.com/obgm/libcoap/pull/1750","tags":["Issue Tracking","Patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-65495","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vr3h-29qc-jvjf"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/65xxx/CVE-2025-65495.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-65495","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-65495","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-65495","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65493","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65494","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65495","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65496","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65497","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65498","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65499","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65500","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-65501","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2025-65495","description":"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.","status":"published","published":"2025-11-24T00:00:00Z","modified":"2025-11-24T14:41:15.867Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-195"],"updated_at":"2026-11-02T14:32:26.64278Z"}],"euvd":[{"id":"EUVD-2025-198714","description":"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 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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.","status":"published","published":"2025-11-24T14:15:47.053Z","modified":"2026-11-05T13:10:00.18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-195"],"updated_at":"2026-11-05T19:55:51.56159Z"}],"osv":[{"id":"CVE-2025-65495","description":"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 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