GHSA-f7hf-m5cf-j6wvHighCVSS 6.5
libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-110714
- https://github.com/sahlberg/libsmb2/commit/523abe20be3207011a936db47f1d3bab79c05450
- https://github.com/sahlberg/libsmb2
- https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-security-descriptor.c#L266
- https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-read
- https://www.vulncheck.com/advisories/libsmb2-through-6.2-heap-out-of-bounds-read-via-decode-acl-integer-underflow
- https://github.com/advisories/GHSA-f7hf-m5cf-j6wv