{"id":"CVE-2026-111137","published":"2026-10-15T19:17:27.690","lastModified":"2026-10-16T18:25:45.343","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.","cvssScore":6.1,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cwes":["CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://github.com/amartin755/libsmi","tags":[]},{"url":"https://github.com/amartin755/libsmi/blob/c58307210fe995ec419db976eb234aebc71a9216/lib/smi.c#L479-L566","tags":[]},{"url":"https://hackmd.io/@haind-pwn/libsmi-smivalueasstring-octetstring-defval-oob-write","tags":[]},{"url":"https://www.vulncheck.com/advisories/libsmi-through-0.5.0-out-of-bounds-write-via-smivalueasstring-octet-string-defval","tags":[]}],"exploitRefs":[{"url":"https://github.com/amartin755/libsmi","tags":[]},{"url":"https://github.com/amartin755/libsmi/blob/c58307210fe995ec419db976eb234aebc71a9216/lib/smi.c#L479-L566","tags":[]}],"hasPoc":true,"ai":null}