Answer in brief
CVE-2026-89821 records a Unknown severity vulnerability in drm/amd/display: avoid divide-by-zero in __is_lut_linear(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=086247a4b2fba49800b27807f22bb894cd8363fb <2320626425f3af3a25b8afb6876f205b1c6d4e64 || >=086247a4b2fba49800b27807f22bb894cd8363fb <d1e06d5dc8f12451ce71dc068342660a34476084 || >=086247a4b2fba49800b27807f22bb894cd8363fb <c127ace7af2b40107947a6504391f94d6fd21734 || >=086247a4b2fba49800b27807f22bb894cd8363fb <4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44 || >=086247a4b2fba49800b27807f22bb894cd8363fb <5f18cd1ba873e751bf5547407ad44ea34adfbe2f || >=086247a4b2fba49800b27807f22bb894cd8363fb <ee28fafb50f58b847509b5240b431ddec673bdfe || >=086247a4b2fba49800b27807f22bb894cd8363fb <15ee43aad0df43dfd1dbb32e7d5b951745c4b87f || >=086247a4b2fba49800b27807f22bb894cd8363fb <4f40873f8a4107df2b9c8e68c947c4fd0cd519d2 | 2320626425f3af3a25b8afb6876f205b1c6d4e64, d1e06d5dc8f12451ce71dc068342660a34476084, c127ace7af2b40107947a6504391f94d6fd21734, 4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44, 5f18cd1ba873e751bf5547407ad44ea34adfbe2f, ee28fafb50f58b847509b5240b431ddec673bdfe, 15ee43aad0df43dfd1dbb32e7d5b951745c4b87f, 4f40873f8a4107df2b9c8e68c947c4fd0cd519d2 |
| Linux/Linuxgeneric | 4.17 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.