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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于rtw88驱动未检查PCI上游桥接是否存在，可能导致在根总线拓扑下探测时崩溃。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 19

VendorProduct Version RangeStatus
Linux Linux 617339466fda09916c4b4151fa5e6a9c1fdae353< 959c13da6c36167ce1016d400a6104d2367f686e affected
24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< 3b89b4c095804c478d50376285e66700cf3c045f affected
24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe affected
24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< 6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6 affected
24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< 000134a20bbf89b1152520a2eef71f91fdb83a5b affected
24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< 3bbbb56204f7359ce2139a9341b43b52a186261c affected
24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< eb101d2abdcccb514ca4fccd3b278dd8267374f6 affected
f21e8cb927fa9da49490b74ddda3856a828b82d6 affected
… +11 more rows
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I. Basic Information for CVE-2026-46092

Vulnerability Information
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Vulnerability Title
wifi: rtw88: check for PCI upstream bridge existence
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于rtw88驱动未检查PCI上游桥接是否存在，可能导致在根总线拓扑下探测时崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 617339466fda09916c4b4151fa5e6a9c1fdae353 ~ 959c13da6c36167ce1016d400a6104d2367f686e -
Linux Linux 5.17 -

II. Public POCs for CVE-2026-46092

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III. Intelligence Information for CVE-2026-46092

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Patches & Fixes for CVE-2026-46092 (7)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45931 7.8 HIGH accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-45935 7.8 HIGH fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-46058 7.8 HIGH media: amphion: Fix race between m2m job_abort and device_run
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration
CVE-2026-45959 7.8 HIGH crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46092

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