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🛡️ CVE-2024-46760 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

wifi: rtw88: usb: schedule rx work after everything is set up

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtw88: usb: schedule rx work after everything is set up

Right now it's possible to hit NULL pointer dereference in

rtw_rx_fill_rx_status on hw object and/or its fields because

initialization routine can start getting USB replies before

rtw_dev is fully setup.

The stack trace looks like this:

rtw_rx_fill_rx_status

rtw8821c_query_rx_desc

rtw_usb_rx_handler

...

queue_work

rtw_usb_read_port_complete

...

usb_submit_urb

rtw_usb_rx_resubmit

rtw_usb_init_rx

rtw_usb_probe

So while we do the async stuff rtw_usb_probe continues and calls

rtw_register_hw, which does all kinds of initialization (e.g.

via ieee80211_register_hw) that rtw_rx_fill_rx_status relies on.

Fix this by moving the first usb_submit_urb after everything

is set up.

For me, this bug manifested as:

[ 8.893177] rtw_8821cu 1-1:1.2: band wrong, packet dropped

[ 8.910904] rtw_8821cu 1-1:1.2: hw->conf.chandef.chan NULL in rtw_rx_fill_rx_status

because I'm using Larry's backport of rtw88 driver with the NULL

checks in rtw_rx_fill_rx_status.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-46760 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.10.10)
  • linux-kernel (from 6.7 up to 6.10.10)

Timeline and source

Published on 18 September 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-09-18
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.10.10
linux-kernel 6.7 6.10.10

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