Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/sahlberg/libsmb2
- https://github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce17
- https://github.com/sahlberg/libsmb2/issues/496
- https://github.com/sahlberg/libsmb2/releases/tag/libsmb2-6.3
- https://hackmd.io/@haindpwn/libsmb2-dcerpc-ndr-count-overflow-oob
- https://www.vulncheck.com/advisories/libsmb2-before-6.3-integer-overflow-in-dce-
FAQ
What is CVE-2026-115505?
CVE-2026-115505 is a vulnerability with a CVSS score of 7.6 (HIGH). 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 ...
How severe is CVE-2026-115505?
CVE-2026-115505 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-115505?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.