CVE-2024-47738: wifi: mac80211: don't use rate mask for offchannel TX either
First published: Mon Oct 21 2024(Updated: )
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
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.10.51<5.11 | |
| Linux Kernel | >=5.12.18<5.13 | |
| Linux Kernel | >=5.13.3<5.14 | |
| Linux Kernel | >=5.14<6.1.113 | |
| Linux Kernel | >=6.2<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 |
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Reference Links
- https://git.kernel.org/stable/c/aafca50e71dc8f3192a5bfb325135a7908f3ef9e
- https://git.kernel.org/stable/c/d54455a3a965feb547711aff7afd2ca5deadb99c
- https://git.kernel.org/stable/c/3565ef215101ffadb5fe5394c70b1fca51376b25
- https://git.kernel.org/stable/c/43897111481b679508711d3ca881c4c6593e9247
- https://git.kernel.org/stable/c/e7a7ef9a0742dbd0818d5b15fba2c5313ace765b
Frequently Asked Questions
What is the severity of CVE-2024-47738?
CVE-2024-47738 has a low severity rating as it pertains to a configuration issue in the Linux kernel.
How do I fix CVE-2024-47738?
To fix CVE-2024-47738, ensure that you update your Linux kernel to the latest version that isn’t affected.
Which Linux kernel versions are affected by CVE-2024-47738?
CVE-2024-47738 affects Linux kernel versions from 5.10.51 to 5.11 and multiple versions up to 6.11.2.
What impact does CVE-2024-47738 have on network performance?
The vulnerability CVE-2024-47738 can lead to incorrect rate settings during off-channel transmission, potentially degrading network performance.
Is CVE-2024-47738 specific to certain hardware?
CVE-2024-47738 is not specific to certain hardware but is rather a vulnerability present in the mac80211 layer of the Linux kernel.
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