Detections
Analytics
CVE-2022-48987
medium
Description
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-dv-timings.c: fix too strict blanking sanity checks Sanity checks were added to verify the v4l2_bt_timings blanking fields in order to avoid integer overflows when userspace passes weird values. But that assumed that userspace would correctly fill in the front porch, backporch and sync values, but sometimes all you know is the total blanking, which is then assigned to just one of these fields. And that can fail with these checks. So instead set a maximum for the total horizontal and vertical blanking and check that each field remains below that. That is still sufficient to avoid integer overflows, but it also allows for more flexibility in how userspace fills in these fields.
References
https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3
https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e
https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608
https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee
https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c
https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2
https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89
https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971