CVE-2026-115505
HIGH
7,2
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A
HIGH
7,6
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: high
Description
AI Translation Available
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.
190
Integer Overflow or Wraparound
StableCommon Consequences
Security Scopes Affected:
Availability
Integrity
Confidentiality
Access Control
Other
Potential Impacts:
Dos: Crash, Exit, Or Restart
Dos: Resource Consumption (Memory)
Dos: Instability
Modify Memory
Execute Unauthorized Code Or Commands
Bypass Protection Mechanism
Alter Execution Logic
Dos: Resource Consumption (Cpu)
Applicable Platforms
Languages:
Not Language-Specific, C
https://github.com/sahlberg/libsmb2
https://github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce1…
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…