CVE-2026-89821: vulnerability in Linux
drm/amd/display: avoid divide-by-zero in __is_lut_linear()
Published
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
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 products
Linux · LinuxRelated CVEs — Linux
In the same product, most dangerous first.
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References
https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87fhttps://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2fhttps://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe