wifi: iwlwifi: mvm: don't trust firmware n_channels
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.2%
exploitation probability
0.2%top 86% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: don't trust firmware n_channels
If the firmware sends us a corrupted MCC response with
n_channels much larger than the command response can be,
we might copy far too much (uninitialized) memory and
even crash if the n_channels is large enough to make it
run out of the one page allocated for the FW response.
Fix that by checking the lengths. Doing a < comparison
would be sufficient, but the firmware should be doing
it correctly, so check more strictly.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/05ad5a4d421ce65652fcb24d46b7e273130240d6https://git.kernel.org/stable/c/557ba100d8cf3661ff8d71c0b4a2cba8db555ec2https://git.kernel.org/stable/c/682b6dc29d98e857e6ca4bbc077c7dc2899b7473https://git.kernel.org/stable/c/c176f03350954b795322de0bfe1d7b514db41f45https://git.kernel.org/stable/c/d0d39bed9e95f27a246be91c5929254ac043ed30https://git.kernel.org/stable/c/e519a404a5bbba37693cb10fa61794a5fce4fd9b