CVE-2021-47471

Summary

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

drm: mxsfb: Fix NULL pointer dereference crash on unload

The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference.

Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxae1ed0093281939b80664a687689f12436c0e874 < f40c2281d2c0674d32ba732fee45222d76495472affected
LinuxLinuxae1ed0093281939b80664a687689f12436c0e874 < b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8affected
LinuxLinuxae1ed0093281939b80664a687689f12436c0e874 < 3cfc183052c3dbf8eae57b6c1685dab00ed3db4aaffected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.10.76 <= 5.10.*unaffected
LinuxLinux5.14.15 <= 5.14.*unaffected
LinuxLinux5.15 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References