CVE-2021-47534

Summary

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

drm/vc4: kms: Add missing drm_crtc_commit_put

Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a global state for the HVS, with each FIFO storing the current CRTC commit so that we can properly synchronize commits.

However, the refcounting was off and we thus ended up leaking the drm_crtc_commit structure every commit. Add a drm_crtc_commit_put to prevent the leakage.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9ec03d7f1ed394897891319a4dda75f52c5d292d < 53f9601e908d42481addd67cdb01a9288c611124affected
LinuxLinux9ec03d7f1ed394897891319a4dda75f52c5d292d < 049cfff8d53a30cae3349ff71a4c01b7d9981bc2affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.7 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References