Integer Overflow or Wraparound Affecting kernel-default package, versions <5.14.21-150400.24.141.1


Severity

Recommended
0.0
low
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-SLES154-KERNELDEFAULT-8448397
  • published3 Dec 2024
  • disclosed2 Dec 2024

Introduced: 2 Dec 2024

NewCVE-2022-48987  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 kernel-default to version 5.14.21-150400.24.141.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default package and not the kernel-default package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

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.

CVSS Scores

version 3.1