CVE-2021-47476

Summary

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

comedi: ni_usb6501: fix NULL-deref in command paths

The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing).

Add the missing sanity checks to probe().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < 58478143771b20ab219937b1c30a706590a59224affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < aa39738423503825625853b643b9e99d11c23816affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < df7b1238f3b599a0b9284249772cdfd1ea83a632affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < bc51111bf6e8e7b6cc94b133e4c291273a16acd1affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < b0156b7c9649d8f55a2ce3d3258509f1b2a181c3affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < 4a9d43cb5d5f39fa39fc1da438517004cc95f7eaaffected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < d6a727a681a39ae4f73081a9bedb45d14f95bdd1affected
LinuxLinuxa03bb00e50ab4c07107da58a52a0bff7943f360c < 907767da8f3a925b060c740e0b5c92ea7dbec440affected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux4.4.292 <= 4.4.*unaffected
LinuxLinux4.9.290 <= 4.9.*unaffected
LinuxLinux4.14.255 <= 4.14.*unaffected
LinuxLinux4.19.217 <= 4.19.*unaffected
LinuxLinux5.4.159 <= 5.4.*unaffected
LinuxLinux5.10.79 <= 5.10.*unaffected
LinuxLinux5.14.18 <= 5.14.*unaffected
LinuxLinux5.15.2 <= 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