Medium 5.5Published May 27, 2026

CVE-2026-46092wifi: rtw88: check for PCI upstream bridge existence

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	617339466fda09916c4b4151fa5e6a9c1fdae353 builds before 959c13da6c36167ce1016d400a6104d2367f686e; 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a builds before 3b89b4c095804c478d50376285e66700cf3c045f; from 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a before cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe; 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a builds before 6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6; from 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a before 000134a20bbf89b1152520a2eef71f91fdb83a5b; 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a builds before 3bbbb56204f7359ce2139a9341b43b52a186261c; from 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a before eb101d2abdcccb514ca4fccd3b278dd8267374f6; f21e8cb927fa9da49490b74ddda3856a828b82d6; and 2 more ranges	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 5.15.17 before 5.16; from 5.16.3 before 7.1	NVD

References

References

https://git.kernel.org/stable/c/959c13da6c36167ce1016d400a6104d2367f686e
https://git.kernel.org/stable/c/3b89b4c095804c478d50376285e66700cf3c045f
https://git.kernel.org/stable/c/cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe
https://git.kernel.org/stable/c/6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6
https://git.kernel.org/stable/c/000134a20bbf89b1152520a2eef71f91fdb83a5b
https://git.kernel.org/stable/c/3bbbb56204f7359ce2139a9341b43b52a186261c
https://git.kernel.org/stable/c/eb101d2abdcccb514ca4fccd3b278dd8267374f6	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.