CVE-2021-47063

Summary

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

drm: bridge/panel: Cleanup connector on bridge detach

If we don't call drm_connector_cleanup() manually in panel_bridge_detach(), the connector will be cleaned up with the other DRM objects in the call to drm_mode_config_cleanup(). However, since our drm_connector is devm-allocated, by the time drm_mode_config_cleanup() will be called, our connector will be long gone. Therefore, the connector must be cleaned up when the bridge is detached to avoid use-after-free conditions.

v2: Cleanup connector only if it was created

v3: Add FIXME

v4: (Use connector->dev) directly in if() block

Affected Software

VendorProductVersion RangeStatus
LinuxLinux13dfc0540a575b47b2d640b093ac16e9e09474f6 < ce450934a00cf896e648fde08d0bd1426653d7a2affected
LinuxLinux13dfc0540a575b47b2d640b093ac16e9e09474f6 < 18149b420c9bd93c443e8d1f48a063d71d9f6aa1affected
LinuxLinux13dfc0540a575b47b2d640b093ac16e9e09474f6 < 98d7d76a74e48ec3ddf2e23950adff7edcab9327affected
LinuxLinux13dfc0540a575b47b2d640b093ac16e9e09474f6 < 4d906839d321c2efbf3fed4bc31ffd9ff55b75c0affected
LinuxLinux4.13affected
LinuxLinux0 < 4.13unaffected
LinuxLinux5.10.37 <= 5.10.*unaffected
LinuxLinux5.11.21 <= 5.11.*unaffected
LinuxLinux5.12.4 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References