CVE-2026-46092
wifi: rtw88: check for PCI upstream bridge existence
Description
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.
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
July 16, 2026, 12:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Apply the provided Linux kernel patch.
- Recompile the Linux kernel.
- Install the updated kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46092.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46092 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46092
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46092 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46092 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 16, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/000134a20bbf89b1152520a2eef71f91fdb83a5b Added Reference https://git.kernel.org/stable/c/3b89b4c095804c478d50376285e66700cf3c045f Added Reference https://git.kernel.org/stable/c/3bbbb56204f7359ce2139a9341b43b52a186261c Added Reference https://git.kernel.org/stable/c/6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6 Added Reference https://git.kernel.org/stable/c/959c13da6c36167ce1016d400a6104d2367f686e Added Reference https://git.kernel.org/stable/c/cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': 'eb101d2abdcccb514ca4fccd3b278dd8267374f6', 'versionType': 'git'}, {'status': 'affected', 'version': '617339466fda09916c4b4151fa5e6a9c1fdae353', 'versionType': 'git'}, {'status': 'affected', 'version': 'f21e8cb927fa9da49490b74ddda3856a828b82d6', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.17', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.16.3', 'lessThan': '5.17', 'versionType': 'semver'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '617339466fda09916c4b4151fa5e6a9c1fdae353', 'lessThan': '959c13da6c36167ce1016d400a6104d2367f686e', 'versionType': 'git'}, {'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': '3b89b4c095804c478d50376285e66700cf3c045f', 'versionType': 'git'}, {'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': 'cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe', 'versionType': 'git'}, {'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': '6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6', 'versionType': 'git'}, {'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': '000134a20bbf89b1152520a2eef71f91fdb83a5b', 'versionType': 'git'}, {'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': '3bbbb56204f7359ce2139a9341b43b52a186261c', 'versionType': 'git'}, {'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': 'eb101d2abdcccb514ca4fccd3b278dd8267374f6', 'versionType': 'git'}, {'status': 'affected', 'version': 'f21e8cb927fa9da49490b74ddda3856a828b82d6', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.17', 'lessThan': '5.15.210', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.16.3', 'lessThan': '5.17', 'versionType': 'semver'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.86', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.27', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.4', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15.17 up to (excluding) 5.16 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16.3 up to (excluding) 7.1 Added Reference Type kernel.org: https://git.kernel.org/stable/c/eb101d2abdcccb514ca4fccd3b278dd8267374f6 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '24f5e38a13b5ae2b6105cda8bb47c19108e62a9a', 'lessThan': 'eb101d2abdcccb514ca4fccd3b278dd8267374f6', 'versionType': 'git'}, {'status': 'affected', 'version': '617339466fda09916c4b4151fa5e6a9c1fdae353', 'versionType': 'git'}, {'status': 'affected', 'version': 'f21e8cb927fa9da49490b74ddda3856a828b82d6', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.17', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.16.3', 'lessThan': '5.17', 'versionType': 'semver'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/realtek/rtw88/pci.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added Description 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. Added Reference https://git.kernel.org/stable/c/eb101d2abdcccb514ca4fccd3b278dd8267374f6