CVE-2021-47653

Summary

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

media: davinci: vpif: fix use-after-free on driver unbind

The driver allocates and registers two platform device structures during probe, but the devices were never deregistered on driver unbind.

This results in a use-after-free on driver unbind as the device structures were allocated using devres and would be freed by driver core when remove() returns.

Fix this by adding the missing deregistration calls to the remove() callback and failing probe on registration errors.

Note that the platform device structures must be freed using a proper release callback to avoid leaking associated resources like device names.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux479f7a1181058689435baddc16a6a42e1a8ff0e8 < 6512c3c39cb6b573b791ce45365818a38b76afbeaffected
LinuxLinux479f7a1181058689435baddc16a6a42e1a8ff0e8 < b5a3bb7f6f164eb6ee74ef4898dcd019b2063448affected
LinuxLinux479f7a1181058689435baddc16a6a42e1a8ff0e8 < 9ffc602e14d7b9f7e7cb2f67e18dfef9ef8af676affected
LinuxLinux479f7a1181058689435baddc16a6a42e1a8ff0e8 < 43acb728bbc40169d2e2425e84a80068270974beaffected
LinuxLinux4.13affected
LinuxLinux0 < 4.13unaffected
LinuxLinux5.15.54 <= 5.15.*unaffected
LinuxLinux5.16.19 <= 5.16.*unaffected
LinuxLinux5.17.2 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References