CVE-2026-115505libsmb2 before 6.3 Integer Overflow in DCE/RPC NDR Decoder via NetrShareEnum

Beschreibung

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.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://hackmd.io/@haindpwn/libsmb2-dcerpc-ndr-count-overflow-oob technical-descriptionexploit
• https://github.com/sahlberg/libsmb2/issues/496 issue-tracking
• https://github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce179ff patch
• libsmb2 libsmb2-6.3 Release Notes release-notes
• https://github.com/sahlberg/libsmb2 product
• VulnCheck Advisory: libsmb2 before 6.3 Integer Overflow in DCE/RPC NDR Decoder via NetrShareEnum third-party-advisory