{"id":"CVE-2026-21126","title":"Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.","summary":"Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-20"],"vendor":"Samsung Mobile","product":"Samsung Mobile Devices","affected":["devices (all versions)"],"published":"2026-10-12","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:17:33.777","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21126","references":[{"url":"https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=10","label":"mobile.security@samsung.com"}],"tags":["nvd","cve.org"],"epss":0.00119,"epssPercentile":0.01751,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T16:14:40.350946Z"},"cvssSource":"cna","ingestedAt":"2026-10-12T14:50:34.086Z","slug":"CVE-2026-21126","body":"## Overview\n\nImproper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to SMR Oct-2026 Release 1 allows local attackers to write out-of-bounds memory.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":38,"depthScoreParts":{"impact":38,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220719,"id":"CVE-2026-21126","ts":1792026726158,"field":"cvss","old":null,"new":"6.9"},{"seq":220718,"id":"CVE-2026-21126","ts":1792026726158,"field":"severity","old":"none","new":"medium"}]}