CVE-2021-47028 mt76: mt7915: fix txrate reporting
A missing check in the mt7915 Wi-Fi driver causes a null pointer dereference, leading to a kernel crash and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47028?
CVE-2021-47028 is a high-severity vulnerability in Linux kernel, published on 28 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mt76: mt7915: fix txrate reporting
Properly check rate_info to fix unexpected reporting.
[ 1215.161863] Call trace: [ 1215.164307] cfg80211_calculate_bitrate+0x124/0x200 [cfg80211] [ 1215.170139] ieee80211s_update_metric+0x80/0xc0 [mac80211] [ 1215.175624] ieee80211_tx_status_ext+0x508/0x838 [mac80211] [ 1215.181190] mt7915_mcu_get_rx_rate+0x28c/0x8d0 [mt7915e] [ 1215.186580] mt7915_mac_tx_free+0x324/0x7c0 [mt7915e] [ 1215.191623] mt7915_queue_rx_skb+0xa8/0xd0 [mt7915e] [ 1215.196582] mt76_dma_cleanup+0x7b0/0x11d0 [mt76] [ 1215.201276] __napi_poll+0x38/0xf8 [ 1215.204668] napi_workfn+0x40/0x80 [ 1215.208062] process_one_work+0x1fc/0x390 [ 1215.212062] worker_thread+0x48/0x4d0 [ 1215.215715] kthread+0x120/0x128 [ 1215.218935] ret_from_fork+0x10/0x1c
Which versions are affected by CVE-2021-47028?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47028?
Apply the vendor's patch.
Is CVE-2021-47028 being exploited?
There is no known exploitation of CVE-2021-47028 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47028, GHSA-68vm-vpf9-fgr6, ROOT-OS-DEBIAN-11-CVE-2021-47028, UBUNTU-CVE-2021-47028.