CVE-2026-102486

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{"bugzilla": {"description": "ntpsec: ntpsec: Denial of Service via out-of-bounds read in NTS extension field parsing", "id": "2558324", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558324"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["Out-of-bounds read in NTS extension field parsing in NTPsec ntpd 1.1.4 through 1.2.5 allows a remote attacker to crash the daemon via an NTS Authenticator and Encrypted Extension Fields (AEEF) field with an oversized nonce length.", "A flaw was found in NTPsec. This flaw allows a remote attacker to cause a Denial of Service (DoS) by crashing the NTP daemon. The issue is caused by an out-of-bounds read vulnerability when parsing Network Time Security (NTS) extension fields that contain an Authenticator and Encrypted Extension Fields (AEEF) field with an oversized nonce length."], "mitigation": {"lang": "en:us", "value": "Disable NTS in ntpd configuration or upgrade to ntpsec 1.2.6."}, "name": "CVE-2026-102486", "public_date": "2026-10-21T15:04:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102486\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102486\nhttps://gitlab.com/NTPsec/ntpsec/-/commit/7cc079387\nhttps://gitlab.com/NTPsec/ntpsec/-/work_items/891\nhttps://gitlab.com/NTPsec/ntpsec/-/work_items/895"], "statement": "An out-of-bounds read flaw was found in NTPsec ntpd NTS extension field parsing. A remote attacker able to complete an NTS-KE TLS handshake and obtain an NTS cookie can send a crafted NTP packet with an oversized nonce length in an NTS AEEF field, causing ntpd to crash (denial of service) on servers with NTS enabled. Versions 1.1.4 through 1.2.5 are affected; the issue is fixed in 1.2.6.", "threat_severity": "Important"}

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