5.5

CVE-2022-48987

media: v4l2-dv-timings.c: fix too strict blanking sanity checks

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.9.332 < 4.9.336
Linux ≫ Linux Kernel Version >= 4.14.298 < 4.14.302
Linux ≫ Linux Kernel Version >= 4.19.264 < 4.19.269
Linux ≫ Linux Kernel Version >= 5.4.226 < 5.4.227
Linux ≫ Linux Kernel Version >= 5.10.153 < 5.10.159
Linux ≫ Linux Kernel Version >= 5.15.77 < 5.15.83
Linux ≫ Linux Kernel Version >= 6.0.7 < 6.0.13
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.25% 0.158
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971
Patch
https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89
Patch
https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2
Patch
https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c
Patch
https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee
Patch
https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608
Patch
https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e
Patch
https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3
Patch