mtdchar: fix integer overflow in read/write ioctls
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/37944f4f8199cd153fef74e95ca268020162f212https://git.kernel.org/stable/c/457376c6fbf0c69326a9bf1f72416225f681192bhttps://git.kernel.org/stable/c/e4185bed738da755b191aa3f2e16e8b48450e1b8https://git.kernel.org/stable/c/eb9361484814fb12f3b7544b33835ea67d7a6a97https://git.kernel.org/stable/c/f37efdd97fd1ec3e0d0f1eec279c8279e28f981e