Описание
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: reject invalid 320 MHz CSA bandwidth
The HT/VHT channel definition validator can receive a 320 MHz
bandwidth indication from a received CSA frame on a non-6 GHz link.
It warns for this unsupported width but continues with an uninitialized
vht_operation.chan_width, which is then read by
ieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a
received frame panic the kernel.
Reject the channel definition before entering the VHT operation
conversion. This preserves the existing CSA fallback while avoiding
both the warning and the uninitialized read.
A flaw was found in the Linux kernel's mac80211 wireless subsystem. A nearby wireless attacker can cause a Denial of Service (DoS) by sending a crafted Channel Switch Announcement (CSA) frame with an unsupported bandwidth configuration. Because the kernel fails to reject this channel definition, it reads uninitialized memory and can trigger a system crash.
Отчет
An invalid 320 MHz bandwidth indication in a received CSA frame on a non 6 GHz WiFi link can leave vht_operation.chan_width uninitialized before it is read by ieee80211_chandef_vht_oper(). With panic_on_warn enabled the WARN_ON in this path can immediately panic the kernel and cause a denial of service. For the CVSS the PR:N value is used because no account or privileges on the target are required to transmit the wireless frame. The attack is adjacent rather than general network remote because the attacker must be within radio reach and the target must process the crafted CSA frame in a suitable link state. The demonstrated impact is availability loss only. There is no supported UAF OOB access information disclosure or write primitive that would justify confidentiality or integrity impact.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Fix deferred |
Показывать по
Ссылки на источники
Дополнительная информация
Статус:
6.5 Medium
CVSS3
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject invalid 320 MHz CSA bandwidth The HT/VHT channel definition validator can receive a 320 MHz bandwidth indication from a received CSA frame on a non-6 GHz link. It warns for this unsupported width but continues with an uninitialized vht_operation.chan_width, which is then read by ieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a received frame panic the kernel. Reject the channel definition before entering the VHT operation conversion. This preserves the existing CSA fallback while avoiding both the warning and the uninitialized read.
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject invalid 320 MHz CSA bandwidth The HT/VHT channel definition validator can receive a 320 MHz bandwidth indication from a received CSA frame on a non-6 GHz link. It warns for this unsupported width but continues with an uninitialized vht_operation.chan_width, which is then read by ieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a received frame panic the kernel. Reject the channel definition before entering the VHT operation conversion. This preserves the existing CSA fallback while avoiding both the warning and the uninitialized read.
In the Linux kernel, the following vulnerability has been resolved: w ...
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject invalid 320 MHz CSA bandwidth The HT/VHT channel definition validator can receive a 320 MHz bandwidth indication from a received CSA frame on a non-6 GHz link. It warns for this unsupported width but continues with an uninitialized vht_operation.chan_width, which is then read by ieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a received frame panic the kernel. Reject the channel definition before entering the VHT operation conversion. This preserves the existing CSA fallback while avoiding both the warning and the uninitialized read.
6.5 Medium
CVSS3