CVEvulnerability
CVE-2026-89821
- Status
- Received
- Published
- 2026-09-16
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: avoid divide-by-zero in __is_lut_linear()
__is_lut_linear() computes the expected value of each entry with
expected = i * MAX_DRM_LUT_VALUE / (size - 1);
If it is ever called with a single-entry LUT, size - 1 is zero and the
kernel takes a divide error (#DE). A LUT with fewer than two entries
cannot describe a linear mapping anyway, so return false early instead
of dividing by zero.
References
- https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f git.kernel.org
- https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64 git.kernel.org
- https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44 git.kernel.org
- https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2 git.kernel.org
- https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f git.kernel.org
- https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734 git.kernel.org
- https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084 git.kernel.org
- https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe git.kernel.org