{"id":"CVE-2026-110714","summary":"libsmb2 through 6.2 Heap Out-of-Bounds Read via decode_acl Integer Underflow","details":"libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads via crafted security descriptors. Attackers controlling a server or intercepting unsigned sessions can send an AclSize below 8 in a QUERY_INFO reply, bypassing ACE bounds checks and crashing the client.","modified":"2026-10-16T02:47:56.071664761Z","published":"2026-10-14T15:01:29.077Z","database_specific":{"cwe_ids":["CWE-191"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110714.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110714.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110714"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/libsmb2-through-6.2-heap-out-of-bounds-read-via-decode-acl-integer-underflow"},{"type":"FIX","url":"https://github.com/sahlberg/libsmb2/commit/523abe20be3207011a936db47f1d3bab79c05450"},{"type":"PACKAGE","url":"https://github.com/sahlberg/libsmb2"},{"type":"ARTICLE","url":"https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-security-descriptor.c#L266"},{"type":"EVIDENCE","url":"https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-read"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sahlberg/libsmb2","events":[{"introduced":"916d039e798cd6a6a60dff97e5441853b653d5f9"},{"fixed":"d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1"},{"fixed":"523abe20be3207011a936db47f1d3bab79c05450"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"libsmb2"},{"fixed":"6.2"}]}}],"versions":["libsmb2-6.1","v6.0.0","libsmb2-6.0","v5.0.0","v4.0.0","v3.0.0","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110714.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}