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CVE-2025-68237 Detail

Description

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/37944f4f8199cd153fef74e95ca268020162f212 kernel.org
https://git.kernel.org/stable/c/457376c6fbf0c69326a9bf1f72416225f681192b kernel.org
https://git.kernel.org/stable/c/e4185bed738da755b191aa3f2e16e8b48450e1b8 kernel.org
https://git.kernel.org/stable/c/eb9361484814fb12f3b7544b33835ea67d7a6a97 kernel.org
https://git.kernel.org/stable/c/f37efdd97fd1ec3e0d0f1eec279c8279e28f981e kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-68237
NVD Published Date:
12/16/2025
NVD Last Modified:
12/16/2025
Source:
kernel.org