Is CVE-2026-111137 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-111137?

CVE-2026-111137 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-111137

Description

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.