4.6

CVE-2021-47476

comedi: ni_usb6501: fix NULL-deref in command paths

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().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.18 < 4.4.292
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.290
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.255
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.217
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.159
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.79
Linux ≫ Linux Kernel Version >= 5.11 < 5.14.18
Linux ≫ Linux Kernel Version >= 5.15 < 5.15.2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.39% 0.304
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 4.6 0.9 3.6
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7ea
Patch
https://git.kernel.org/stable/c/58478143771b20ab219937b1c30a706590a59224
Patch
https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440
Patch
https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816
Patch
https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3
Patch
https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1
Patch
https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1
Patch
https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632
Patch
https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1
Patch