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

AI Predicted 5.5 Difficulty: Trivial EPSS 0.02% · P7

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinux24f5e38a13b5ae2b6105cda8bb47c19108e62a9a< eb101d2abdcccb514ca4fccd3b278dd8267374f6affected
617339466fda09916c4b4151fa5e6a9c1fdae353affected
f21e8cb927fa9da49490b74ddda3856a828b82d6affected
5.15.17< 5.16affected
5.16.3< 5.17affected
5.17affected
< 5.17unaffected
7.1-rc1≤ *unaffected
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a ~ eb101d2abdcccb514ca4fccd3b278dd8267374f6 -
LinuxLinux 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 (1)

Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total

CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459729.8 CRITICALsmb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-459427.8 HIGHext4: fix e4b bitmap inconsistency reports
CVE-2026-459707.8 HIGHbonding: alb: fix UAF in rlb_arp_recv during bond up/down
CVE-2026-459807.8 HIGHaccel/amdxdna: Stop job scheduling across aie2_release_resource()
CVE-2026-459517.8 HIGHbpf: Fix a potential use-after-free of BTF object
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-460367.8 HIGHvfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-459317.8 HIGHaccel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-460657.8 HIGHfbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info

Showing top 20 of 276 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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