CVE-2026-89821
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedSep 16, 2026
First seenSep 16, 2026
How to fix
Update
- Linux Linux2320626425f3af3a25b8afb6876f205b1c6d4e64, d1e06d5dc8f12451ce71dc068342660a34476084, c127ace7af2b40107947a6504391f94d6fd21734, 4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44, 5f18cd1ba873e751bf5547407ad44ea34adfbe2f, ee28fafb50f58b847509b5240b431ddec673bdfe, 15ee43aad0df43dfd1dbb32e7d5b951745c4b87f, 4f40873f8a4107df2b9c8e68c947c4fd0cd519d2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < 2320626425f3af3a25b8afb6876f205b1c6d4e64, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < d1e06d5dc8f12451ce71dc068342660a34476084, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < c127ace7af2b40107947a6504391f94d6fd21734, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < 4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < 5f18cd1ba873e751bf5547407ad44ea34adfbe2f, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < ee28fafb50f58b847509b5240b431ddec673bdfe, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < 15ee43aad0df43dfd1dbb32e7d5b951745c4b87f, 086247a4b2fba49800b27807f22bb894cd8363fb ≤ v < 4f40873f8a4107df2b9c8e68c947c4fd0cd519d2, 4.17 | 2320626425f3af3a25b8afb6876f205b1c6d4e64, d1e06d5dc8f12451ce71dc068342660a34476084, c127ace7af2b40107947a6504391f94d6fd21734, 4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44, 5f18cd1ba873e751bf5547407ad44ea34adfbe2f, ee28fafb50f58b847509b5240b431ddec673bdfe, 15ee43aad0df43dfd1dbb32e7d5b951745c4b87f, 4f40873f8a4107df2b9c8e68c947c4fd0cd519d2 |
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