VDB
DEBIAN-CVE-2025-68237
DEBIAN-CVE-2025-68237
PUBLISHED
CVSS 9.300000190734863 CRITICAL
In the Linux kernel, the following vulnerability has been resolved: mtdchar: fix integer overflow in read/write ioctls The "req.start" and "req.len" variables are u64 values that come from the user at the start of the function. We mask away the high 32 bits of "req.len" so that's capped at U32_MAX but the "req.start" variable can go up to U64_MAX which means that the addition can still integer overflow. Use check_add_overflow() to fix this bug.
Risk Scores
CVSS 4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 0, 6.1.147-1, 6.1.124-1 |
| Debian:13 | linux | 6.12.43-1, 0, 6.12.38-1 |
| Debian:11 | linux-6.1 | 0, 6.1.106-3~deb11u1, 6.1.106-3~deb11u2 |
| Debian:14 | linux | 6.13.4-1, 6.13.3-1, 6.13.2-1 |
Exploit Intelligence
- 4081.3.7.yml (github-poc)
Timeline
- Dec 16, 2025 CVE Published
- Apr 28, 2026 CVE Updated