5.5

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 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.
Data is provided by the 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
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.05% 0.162
CVSS Metriken
Source 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.