{"cve":"CVE-2025-68237","nvd":{"published":"2025-12-16T14:15:58.850","modified":"2026-10-14T13:10:00.187","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtdchar: fix integer overflow in read/write ioctls\n\nThe \"req.start\" and \"req.len\" variables are u64 values that come from the\nuser at the start of the function.  We mask away the high 32 bits of\n\"req.len\" so that's capped at U32_MAX but the \"req.start\" variable can go\nup to U64_MAX which means that the addition can still integer overflow.\n\nUse check_add_overflow() to fix this bug.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/37944f4f8199cd153fef74e95ca268020162f212","https://git.kernel.org/stable/c/457376c6fbf0c69326a9bf1f72416225f681192b","https://git.kernel.org/stable/c/e4185bed738da755b191aa3f2e16e8b48450e1b8","https://git.kernel.org/stable/c/eb9361484814fb12f3b7544b33835ea67d7a6a97","https://git.kernel.org/stable/c/f37efdd97fd1ec3e0d0f1eec279c8279e28f981e"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:17:07.138532058+00:00"},"epss":{"cve":"CVE-2025-68237","score":0.00186,"percentile":0.08095,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}