Riskcovery

CVE-2025-40336

drm/gpusvm: fix hmm_pfn_to_map_order() usage

State
Published
Severity
8.8 High
Published
Dec 9, 2025
Updated
Oct 15, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/gpusvm: fix hmm_pfn_to_map_order() usage

Handle the case where the hmm range partially covers a huge page (like 2M), otherwise we can potentially end up doing something nasty like mapping memory which is outside the range, and maybe not even mapped by the mm. Fix is based on the xe userptr code, which in a future patch will directly use gpusvm, so needs alignment here.

v2: - Add kernel-doc (Matt B) - s/fls/ilog2/ (Thomas)

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 99624bdff8670795b678eafa6509aaad3a5c0175 to before 08e9fd78ba1b9e95141181c69cc51795c9888157Affected
  • 99624bdff8670795b678eafa6509aaad3a5c0175 to before c50729c68aaf93611c855752b00e49ce1fdd1558Affected
LinuxLinux
  • 6.15Affected
  • before 6.15Not affected
  • 6.17.8 through 6.17.*Not affected
  • 6.18 and laterNot affected

References

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