High severity7.6NVD Advisory· Published Oct 22, 2026
CVE-2026-115505
CVE-2026-115505
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.
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Affected products
1Patches
Vulnerability mechanics
References
5- github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce179ffnvd
- github.com/sahlberg/libsmb2/issues/496nvd
- github.com/sahlberg/libsmb2/releases/tag/libsmb2-6.3nvd
- hackmd.io/@haindpwn/libsmb2-dcerpc-ndr-count-overflow-oobnvd
- www.vulncheck.com/advisories/libsmb2-before-6.3-integer-overflow-in-dce-rpc-ndr-decoder-via-netrshareenumnvd
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