CVE-2026-89821
N/A
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < 2320626425f3af3a25b8afb6876f205b1c6d4e64 | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < d1e06d5dc8f12451ce71dc068342660a34476084 | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < c127ace7af2b40107947a6504391f94d6fd21734 | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < 4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44 | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < 5f18cd1ba873e751bf5547407ad44ea34adfbe2f | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < ee28fafb50f58b847509b5240b431ddec673bdfe | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < 15ee43aad0df43dfd1dbb32e7d5b951745c4b87f | affected |
| Linux | Linux | 086247a4b2fba49800b27807f22bb894cd8363fb < 4f40873f8a4107df2b9c8e68c947c4fd0cd519d2 | affected |
| Linux | Linux | 4.17 | affected |
| Linux | Linux | 0 < 4.17 | unaffected |
| Linux | Linux | 5.10.270 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.221 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.188 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.157 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.110 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.51 <= 6.18.* | unaffected |
| Linux | Linux | 7.2.5 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64
- https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084
- https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734
- https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44
- https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f
- https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe
- https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f
- https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2
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