CVE-2021-46932

Summary

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

Input: appletouch - initialize work before device registration

Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization.

This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens after input_register_device() call.

So this patch moves dev->work initialization before registering input device

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4affected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < d1962f263a176f493400b8f91bfbf2bfedce951eaffected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99faffected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < a02e1404e27855089d2b0a0acc4652c2ce65fe46affected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < 975774ea7528b489930b76a77ffc4d5379b95ff2affected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < 9f329d0d6c91142cf0ad08d23c72dd195db2633caffected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < e79ff8c68acb1eddf709d3ac84716868f2a91012affected
LinuxLinux5a6eb676d3bc4d7a6feab200a92437b62ad298da < 9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0affected
LinuxLinux2.6.23affected
LinuxLinux0 < 2.6.23unaffected
LinuxLinux4.4.298 <= 4.4.*unaffected
LinuxLinux4.9.296 <= 4.9.*unaffected
LinuxLinux4.14.261 <= 4.14.*unaffected
LinuxLinux4.19.224 <= 4.19.*unaffected
LinuxLinux5.4.170 <= 5.4.*unaffected
LinuxLinux5.10.90 <= 5.10.*unaffected
LinuxLinux5.15.13 <= 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