CVE-2021-47360

Summary

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

binder: make sure fd closes complete

During BC_FREE_BUFFER processing, the BINDER_TYPE_FDA object cleanup may close 1 or more fds. The close operations are completed using the task work mechanism – which means the thread needs to return to userspace or the file object may never be dereferenced – which can lead to hung processes.

Force the binder thread back to userspace if an fd is closed during BC_FREE_BUFFER handling.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux80cd795630d6526ba729a089a435bf74a57af927 < aa2c274c279ff365a06a4cba263f04965895166eaffected
LinuxLinux80cd795630d6526ba729a089a435bf74a57af927 < d5b0473707fa53b03a5db0256ce62b2874bddbc7affected
LinuxLinux80cd795630d6526ba729a089a435bf74a57af927 < b95483d8d94b41fa31a84c1d86710b7907a37621affected
LinuxLinux80cd795630d6526ba729a089a435bf74a57af927 < 5fdb55c1ac9585eb23bb2541d5819224429e103daffected
LinuxLinux27564d8d5d12d2ff197055346069c6bdbe08a8c2affected
LinuxLinux4.20.1 < 4.21affected
LinuxLinux5.0affected
LinuxLinux0 < 5.0unaffected
LinuxLinux5.4.150 <= 5.4.*unaffected
LinuxLinux5.10.70 <= 5.10.*unaffected
LinuxLinux5.14.9 <= 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