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libsmi libsmilibsmi through 0.5.0 Out-of-Bounds Write via smiValueAsString OCTET STRING DEFVAL

Risk 41
Severity
6.1
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

libsmi through 0.5.0 contains an out-of-bounds write vulnerability in smiValueAsString() in lib/smi.c that allows attackers to overflow a fixed 1024-byte static buffer through hex rendering of OCTET STRING values. Attackers can supply a crafted MIB with an OCTET STRING DEFVAL of 512 or more octets and a leading 0x00 byte to corrupt adjacent library globals and crash smidump or other consumers.

First published (updated )
CVE-2026-111137

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