{"id":"CVE-2026-111137","revision":"070eac3b406e48999e146a59efe269fe","records":[{"revision":"070eac3b406e48999e146a59efe269fe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111137","aliases":[],"title":"libsmi through 0.5.0 Out-of-Bounds Write via smiValueAsString OCTET STRING DEFVAL","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.","state":0,"publishedAt":"2026-10-15T18:57:30.581+00:00","modifiedAt":"2026-10-16T17:10:45+00:00","affected":[{"ecosystem":"https://github.com/amartin755/libsmi","name":"libsmi","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"amartin755\",\n                    \"product\": \"libsmi\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"0.5.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"collectionURL\": \"https://github.com/amartin755/libsmi\",\n                    \"repo\": \"https://github.com/amartin755/libsmi\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","score":6.1,"severity":"MEDIUM"}],"references":["https://hackmd.io/@haind-pwn/libsmi-smivalueasstring-octetstring-defval-oob-write","https://github.com/amartin755/libsmi/blob/c58307210fe995ec419db976eb234aebc71a9216/lib/smi.c#L479-L566","https://github.com/amartin755/libsmi","https://www.vulncheck.com/advisories/libsmi-through-0.5.0-out-of-bounds-write-via-smivalueasstring-octet-string-defval"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111137","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111137","identifiers":["CVE-2026-111137"]},"retained":false,"historicalAffected":[]}],"coverage":[]}