{"id":"CVE-2025-50343","title":"An issue was discovered in matio 1.5.28","summary":"An issue was discovered in matio 1.5.28. A heap-based memory corruption can occur in Mat_VarCreateStruct() when the nfields value does not match the actual number of strings in the fields array. This leads to out-of-bounds reads and inva…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"matio_project","product":"matio","affected":["matio = 1.5.28"],"published":"2025-12-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T18:17:57.957","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-50343","references":[{"url":"https://github.com/tbeu/matio/issues/275","label":"cve@mitre.org"},{"url":"https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md","label":"cve@mitre.org"},{"url":"https://github.com/tbeu/matio/issues/275","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/zakkanijia/POC/blob/main/matio/CVE-2025-50343/matio.md","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00411,"epssPercentile":0.32911,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-01-02T15:59:53.648727Z"},"ingestedAt":"2026-09-30T18:17:24.540Z","slug":"CVE-2025-50343","body":"## Overview\n\nAn issue was discovered in matio 1.5.28. A heap-based memory corruption can occur in Mat_VarCreateStruct() when the nfields value does not match the actual number of strings in the fields array. This leads to out-of-bounds reads and invalid memory frees during cleanup, potentially causing a segmentation fault or heap corruption. NOTE: Multiple third-parties note that the available evidence does not demonstrate a vulnerability exploitable through an attacker-controlled input path.\n\n## Affected\n\n- `matio = 1.5.28`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}