drm/amd/display: avoid divide-by-zero in __is_lut_linear()
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.
CVE-2026-89821
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89821
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "2320626425f3af3a25b8afb6876f205b1c6d4e64",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "d1e06d5dc8f12451ce71dc068342660a34476084",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "c127ace7af2b40107947a6504391f94d6fd21734",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "5f18cd1ba873e751bf5547407ad44ea34adfbe2f",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "ee28fafb50f58b847509b5240b431ddec673bdfe",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "15ee43aad0df43dfd1dbb32e7d5b951745c4b87f",
"versionType": "git"
},
{
"status": "affected",
"version": "086247a4b2fba49800b27807f22bb894cd8363fb",
"lessThan": "4f40873f8a4107df2b9c8e68c947c4fd0cd519d2",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89821
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36280 · Revision 1
- Added to Heist Feed
- Publisher date