{"id":"CLEANSTART-2023-CR50278","summary":"incorrect \"pair?\" check in the Scheme \"length\" procedure results in an unsafe pointer dereference in all CHICKEN Scheme versions prior to 4","details":"Security vulnerability affects the chicken package. An incorrect \"pair?\" check in the Scheme \"length\" procedure results in an unsafe pointer dereference in all CHICKEN Scheme versions prior to 4.","modified":"2026-10-01T00:45:07.218840273Z","published":"2026-09-30T19:15:01.750638Z","upstream":["CVE-2017-9334"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2023/CLEANSTART-2023-CR50278.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2017-9334"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-9334"}],"affected":[{"package":{"name":"chicken","ecosystem":"CleanStart"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.0-r2"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2023/CLEANSTART-2023-CR50278.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}