Riskcovery

CVE-2022-50036

drm/sun4i: dsi: Prevent underflow when computing packet sizes

State
Published
Severity
Not scored
Published
Jun 18, 2025
Updated
May 11, 2026
Reserved
Jun 18, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/sun4i: dsi: Prevent underflow when computing packet sizes

Currently, the packet overhead is subtracted using unsigned arithmetic. With a short sync pulse, this could underflow and wrap around to near the maximal u16 value. Fix this by using signed subtraction. The call to max() will correctly handle any negative numbers that are produced.

Apply the same fix to the other timings, even though those subtractions are less likely to underflow.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 133add5b5ad42b7bb5fcd59d681aef6475d08600 to before a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26Affected
  • 133add5b5ad42b7bb5fcd59d681aef6475d08600 to before 98e28de472ef248352f04f87e29e634ebb0ec240Affected
  • 133add5b5ad42b7bb5fcd59d681aef6475d08600 to before fb837f5b83461624e525727a8f4add14b201147eAffected
  • 133add5b5ad42b7bb5fcd59d681aef6475d08600 to before 82a1356a933d8443139f8886f11b63c974a09a67Affected
LinuxLinux
  • 4.18Affected
  • before 4.18Not affected
  • 5.10.138 through 5.10.*Not affected
  • 5.15.63 through 5.15.*Not affected
  • 5.19.4 through 5.19.*Not affected
  • 6.0 and laterNot affected

References

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