CVE-2026-89821

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Source
https://cve.org/CVERecord?id=CVE-2026-89821
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89821.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-89821
Downstream
Published
2026-09-16T10:30:53Z
Modified
2026-09-18T03:48:33Z
Summary
drm/amd/display: avoid divide-by-zero in __is_lut_linear()
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89821.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
086247a4b2fba49800b27807f22bb894cd8363fb
Fixed
2320626425f3af3a25b8afb6876f205b1c6d4e64
Fixed
d1e06d5dc8f12451ce71dc068342660a34476084
Fixed
c127ace7af2b40107947a6504391f94d6fd21734
Fixed
4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44
Fixed
5f18cd1ba873e751bf5547407ad44ea34adfbe2f
Fixed
ee28fafb50f58b847509b5240b431ddec673bdfe
Fixed
15ee43aad0df43dfd1dbb32e7d5b951745c4b87f
Fixed
4f40873f8a4107df2b9c8e68c947c4fd0cd519d2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89821.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.17.0
Fixed
5.10.270
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.221
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.188
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.157
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.110
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.51
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.2.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89821.json"