CVE-2026-46092

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.

• CWE-476

• https://git.kernel.org/stable/c/000134a20bbf89b1152520a2eef71f91fdb83a5b
• https://git.kernel.org/stable/c/3b89b4c095804c478d50376285e66700cf3c045f
• https://git.kernel.org/stable/c/3bbbb56204f7359ce2139a9341b43b52a186261c
• https://git.kernel.org/stable/c/6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6
• https://git.kernel.org/stable/c/959c13da6c36167ce1016d400a6104d2367f686e
• https://git.kernel.org/stable/c/cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe
• https://git.kernel.org/stable/c/eb101d2abdcccb514ca4fccd3b278dd8267374f6Patch

Published

May 27, 2026

Last Modified

Jul 16, 2026

Status

Modified

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