{"id":"CVE-2026-110714","revision":"2738a4dd84fa48cca6a38622cbfed480","records":[{"revision":"2738a4dd84fa48cca6a38622cbfed480","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110714","aliases":[],"title":"libsmb2 through 6.2 Heap Out-of-Bounds Read via decode_acl Integer Underflow","description":"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.","state":0,"publishedAt":"2026-10-14T15:01:29.077+00:00","modifiedAt":"2026-10-20T01:29:23.174+00:00","affected":[{"ecosystem":"https://github.com/sahlberg/libsmb2","name":"libsmb2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sahlberg\",\n                    \"product\": \"libsmb2\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThanOrEqual\": \"6.2\"\n                        }\n                    ],\n                    \"collectionURL\": \"https://github.com/sahlberg/libsmb2\",\n                    \"repo\": \"https://github.com/sahlberg/libsmb2\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-read","https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-security-descriptor.c#L266","https://github.com/sahlberg/libsmb2/commit/523abe20be3207011a936db47f1d3bab79c05450","https://github.com/sahlberg/libsmb2","https://www.vulncheck.com/advisories/libsmb2-through-6.2-heap-out-of-bounds-read-via-decode-acl-integer-underflow"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110714","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110714","identifiers":["CVE-2026-110714"]},"retained":false,"historicalAffected":[]}],"coverage":[]}