---
cve: "CVE-2026-89821"
severity: "LOW"
cvss: 3.1
epss: "5.1%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-16 11:16:47"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T10:35:05+02:00"
---

# CVE-2026-89821

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.270
- Kernel ≥ 5.15.221
- Kernel ≥ 6.1.188
- Kernel ≥ 6.6.157
- Kernel ≥ 6.12.110
- Kernel ≥ 6.18.51
- Kernel ≥ 7.2.5

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-89821) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_