TI-2026-33816 Aliases CVE-2026-46092 GHSA-wxwq-c95x-686r

wifi: rtw88: check for PCI upstream bridge existence

LOW 24CWE-476Published 2026-05-27 · Updated 2026-11-06

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00136 3rd percentileScored 2026-11-07

Fix Partial Linux (Linux): 5.15.210, 5.17, 6.1.175 +5Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	5.15.17 to before 5.15.210; 5.16.3 to before 5.17	5.15.210, 5.17	Patch available	CNA
Linux	Linux	5.17 and later	5.15.210, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1	Patch available	CNA

Linux VendorLinux Affected 5.15.17 to before 5.15.210; 5.16.3 to before 5.17 Fixed in 5.15.210, 5.17 Patch available CNA
Linux VendorLinux Affected 5.17 and later Fixed in 5.15.210, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	5.15.17 to before 5.16; 5.16.3 to before 7.1	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15.17 to before 5.16; 5.16.3 to before 7.1 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 5.15.210, 5.17
Fix · CNA Linux (Linux) Fixed in 5.15.210, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Not affected: 2 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7

Timeline

2026-10-02 Threatist record created from CVE-2026-46092
2026-10-03 Alias added: GHSA-wxwq-c95x-686r
2026-11-06 CISA SSVC decision points changed

References

Patch 1

https://git.kernel.org/stable/c/eb101d2abdcccb514ca4fccd3b278dd8267374f6

Other 6

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences