{"id":"CVE-2026-25772","summary":"Wazuh Database Synchronization Vulnerable to Stack-based Buffer Overflow via snprintf Integer Underflow","details":"Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.14.3, a stack-based buffer overflow vulnerability exists in the Wazuh Database synchronization module (`wdb_delta_event.c`). The SQL query construction logic allows for an integer underflow when calculating the remaining buffer size. This occurs because the code incorrectly aggregates the return value of `snprintf`. If a specific database synchronization payload exceeds the size of the query buffer (2048 bytes), the size calculation wraps around to a massive integer, effectively removing bounds checking for subsequent writes. This allows an attacker to corrupt the stack, leading to a Denial of Service (DoS) or potentially RCE. Version 4.14.3 fixes the issue.","aliases":["GHSA-h7vp-j34v-h6j5"],"modified":"2026-04-10T05:40:45.743734Z","published":"2026-03-17T18:11:05.707Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25772.json","cwe_ids":["CWE-121","CWE-191"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25772.json"},{"type":"ADVISORY","url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-h7vp-j34v-h6j5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25772"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wazuh/wazuh","events":[{"introduced":"2477e9fa50bc1424e834ac8401ce2450a5978e75"},{"fixed":"b6b6e94a432f7a3e20d1eea1c58ebd01d2d30999"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25772.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}