CVE-2021-47421

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue arises when a PCI error state pci channel io normal is detected, leading to a report of PCI ERS RESULT CAN RECOVER status to the PCI driver. This causes the PCI driver to continue executing the PCI resume callback report resume by pci walk bridge, which then goes into amdgpu pci resume. Here, a write lock is released unconditionally without being acquired first, resulting in a deadlock when other threads attempt to acquire the read lock. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.

Technical details about exploitation include:

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.