Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes [WHY] When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dml_log2 returns an unexpected negative value: shift exponent 4294966273 is too large for 32-bit type 'int' [HOW] In the case PTEBufferSizeInRequests is zero, skip the dml_log2() and assign the result directly.
Affected products
linux: linux kernel
References5
- git.kernel.org/stable/c/031f196d1b1b6d5dfcb0533b431e3ab1750e6189 Patch
- git.kernel.org/stable/c/7257070be70e19a9138f39009c1a26c83a8a7cfa Patch
- git.kernel.org/stable/c/a16394b5d661afec9a264fecac3abd87aea439ea Patch
- git.kernel.org/stable/c/bec1bea2fa974e63f6059c33edde669c7894d0bc Patch
- git.kernel.org/stable/c/e12b95680821b9880cd9992c0f3555389363604f Patch
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 12 · as of 7 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
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