CVE-2022-50039

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

stmmac: intel: Add a missing clk_disable_unprepare() call in intel_eth_pci_remove()

Commit 09f012e64e4b ("stmmac: intel: Fix clock handling on error and remove

paths") removed this clk_disable_unprepare()

This was partly revert by commit ac322f86b56c ("net: stmmac: Fix clock

handling on remove path") which removed this clk_disable_unprepare()

because:

"

While unloading the dwmac-intel driver, clk_disable_unprepare() is

being called twice in stmmac_dvr_remove() and

intel_eth_pci_remove(). This causes kernel panic on the second call.

"

However later on, commit 5ec55823438e8 ("net: stmmac: add clocks management

for gmac driver") has updated stmmac_dvr_remove() which do not call

clk_disable_unprepare() anymore.

So this call should now be called from intel_eth_pci_remove().

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References