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CVE-2021-47476

comedi: ni_usb6501: fix NULL-deref in command paths PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Linux / Linuxaffected a03bb00e50ab4c07107da58a52a0bff7943f360c before 58478143771b20ab219937b1c30a706590a59224; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before aa39738423503825625853b643b9e99d11c23816; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before df7b1238f3b599a0b9284249772cdfd1ea83a632; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before bc51111bf6e8e7b6cc94b133e4c291273a16acd1; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before b0156b7c9649d8f55a2ce3d3258509f1b2a181c3; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before 4a9d43cb5d5f39fa39fc1da438517004cc95f7ea; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before d6a727a681a39ae4f73081a9bedb45d14f95bdd1; affected a03bb00e50ab4c07107da58a52a0bff7943f360c before 907767da8f3a925b060c740e0b5c92ea7dbec440
Linux / Linuxaffected 3.18; unaffected 0 before 3.18; unaffected 4.4.292 through 4.4.*; unaffected 4.9.290 through 4.9.*; unaffected 4.14.255 through 4.14.*; unaffected 4.19.217 through 4.19.*; unaffected 5.4.159 through 5.4.*; unaffected 5.10.79 through 5.10.*; unaffected 5.14.18 through 5.14.*; unaffected 5.15.2 through 5.15.*; unaffected 5.16 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.