CVE-2024-47738: wifi: mac80211: don't use rate mask for offchannel TX either

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-21 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: don't use rate mask for offchannel TX either Like the commit ab9177d83c04 ("wifi: mac80211: don't use rate mask for scanning"), ignore incorrect settings to avoid no supported rate warning reported by syzbot. The syzbot did bisect and found cause is commit 9df66d5b9f45 ("cfg80211: fix default HE tx bitrate mask in 2G band"), which however corrects bitmask of HE MCS and recognizes correctly settings of empty legacy rate plus HE MCS rate instead of returning -EINVAL. As suggestions [1], follow the change of SCAN TX to consider this case of offchannel TX as well. [1] https://lore.kernel.org/linux-wireless/6ab2dc9c3afe753ca6fdcdd1421e7a1f47e87b84.camel@sipsolutions.net/T/#m2ac2a6d2be06a37c9c47a3d8a44b4f647ed4f024

Affected products

Linux kernel: from 5.10.51 before 5.11; from 5.12.18 before 5.13; from 5.13.3 before 5.14; from 5.14 before 6.1.113; from 6.2 before 6.6.54; from 6.7 before 6.10.13 — fixed in 5.11, 5.13, 5.14, 6.1.113, 6.10.13, 6.11.2

How to fix

Upgrade to a fixed version: Linux kernel 5.11, 5.13, 5.14, 6.1.113. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-47738 or the next vulnerability affects your stack