wifi: rtw88: check for PCI upstream bridge existence
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtw88: check for PCI upstream bridge existence
pci_upstream_bridge() returns NULL if the device is on a root bus. If
8821CE is installed in the system with such a PCI topology, the probing
routine will crash. This has probably been unnoticed as 8821CE is mostly
supplied in laptops where there is a PCI-to-PCI bridge located upstream
from the device. However the card might be installed on a system with
different configuration.
Check if the bridge does exist for the specific workaround to be applied.
Found by Linux Verification Center (linuxtesting.org) with Svace static
analysis tool.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/000134a20bbf89b1152520a2eef71f91fdb83a5bhttps://git.kernel.org/stable/c/3b89b4c095804c478d50376285e66700cf3c045fhttps://git.kernel.org/stable/c/3bbbb56204f7359ce2139a9341b43b52a186261chttps://git.kernel.org/stable/c/6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6https://git.kernel.org/stable/c/959c13da6c36167ce1016d400a6104d2367f686ehttps://git.kernel.org/stable/c/cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fehttps://git.kernel.org/stable/c/eb101d2abdcccb514ca4fccd3b278dd8267374f6