CVE-2022-48987
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…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 4.9.332 before 4.9.336 from 4.14.298 before 4.14.302 from 4.19.264 before 4.19.269 from 5.4.226 before 5.4.227 from 5.10.153 before 5.10.159 from 5.15.77 before 5.15.83 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971
- https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89
- https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2
- https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c
- https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee
- https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608
- https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e
- https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3