{"id":"CVE-2026-110714","title":"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","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-191"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:17:43.473","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110714","references":[{"url":"https://github.com/sahlberg/libsmb2","label":"disclosure@vulncheck.com"},{"url":"https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-security-descriptor.c#L266","label":"disclosure@vulncheck.com"},{"url":"https://github.com/sahlberg/libsmb2/commit/523abe20be3207011a936db47f1d3bab79c05450","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-read","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/libsmb2-through-6.2-heap-out-of-bounds-read-via-decode-acl-integer-underflow","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org","exploit-available"],"ingestedAt":"2026-10-14T16:40:32.116Z","vendor":"sahlberg","product":"libsmb2","affected":["libsmb2 <= 6.2"],"epss":0.00538,"epssPercentile":0.45093,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-20T01:29:12.014593Z"},"slug":"CVE-2026-110714","body":"## Overview\n\nlibsmb2 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":225294,"id":"CVE-2026-110714","ts":1792461016414,"field":"exploit_available","old":"false","new":"true"}]}