CVE-2021-47253

Summary

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

drm/amd/display: Fix potential memory leak in DMUB hw_init

[Why] On resume we perform DMUB hw_init which allocates memory: dm_resume->dm_dmub_hw_init->dc_dmub_srv_create->kzalloc That results in memory leak in suspend/resume scenarios.

[How] Allocate memory for the DC wrapper to DMUB only if it was not allocated before. No need to reallocate it on suspend/resume.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8c7aea404d55dabc71df792c850aed5536ece2fd < 9e8c2af010463197315fa54a6c17e74988b5259caffected
LinuxLinux8c7aea404d55dabc71df792c850aed5536ece2fd < aa000f828e60ac15d6340f606ec4a673966f5b0baffected
LinuxLinux8c7aea404d55dabc71df792c850aed5536ece2fd < c5699e2d863f58221044efdc3fa712dd32d55cdeaffected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.45 <= 5.10.*unaffected
LinuxLinux5.12.12 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References