{"id":"CVE-2026-115505","published":"2026-10-22T20:17:06.470","lastModified":"2026-10-23T13:19:13.070","description":"libsmb2 before 6.3 contains integer overflow vulnerabilities in the DCE/RPC NDR decoder in lib/dcerpc.c that allow heap out-of-bounds reads and writes. A malicious SMB server or machine-in-the-middle on unsigned connections can send crafted NetrShareEnum replies with wrapping actual_count or max_count values when clients call smb2_share_enum_async(), corrupting heap memory.","cvssScore":7.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","cwes":["CWE-190"],"vendors":[],"products":[],"references":[{"url":"https://github.com/sahlberg/libsmb2","tags":[]},{"url":"https://github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce179ff","tags":[]},{"url":"https://github.com/sahlberg/libsmb2/issues/496","tags":[]},{"url":"https://github.com/sahlberg/libsmb2/releases/tag/libsmb2-6.3","tags":[]},{"url":"https://hackmd.io/@haindpwn/libsmb2-dcerpc-ndr-count-overflow-oob","tags":[]},{"url":"https://www.vulncheck.com/advisories/libsmb2-before-6.3-integer-overflow-in-dce-rpc-ndr-decoder-via-netrshareenum","tags":[]}],"exploitRefs":[{"url":"https://github.com/sahlberg/libsmb2","tags":[]},{"url":"https://github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce179ff","tags":[]},{"url":"https://github.com/sahlberg/libsmb2/issues/496","tags":[]},{"url":"https://github.com/sahlberg/libsmb2/releases/tag/libsmb2-6.3","tags":[]}],"hasPoc":true,"ai":null}