Описание
A NULL pointer dereference vulnerability was found in the Intel iwlwifi wireless driver in the Linux kernel. When using Multi-Link Operation (MLO) mode, the iwl_mvm_max_amsdu_size() function incorrectly accesses vif->bss_conf.chandef.chan->band, which leads to a NULL pointer dereference because bss_conf is not used in MLO configurations.
Отчет
This vulnerability affects systems with Intel wireless adapters using MLO (Wi-Fi 7) features. Exploitation causes a kernel crash but requires local access and specific MLO wireless configuration. The issue is limited to newer hardware supporting Multi-Link Operation and does not affect standard wireless configurations.
Меры по смягчению последствий
To mitigate this issue, prevent the iwlwifi module from being loaded if Intel wireless networking with MLO is not required. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel | Fix deferred | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | ||
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | ||
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2023:7077 | 14.11.2023 |
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Дополнительная информация
Статус:
5.5 Medium
CVSS3
Связанные уязвимости
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: fix iwl_mvm_max_amsdu_size() for MLO For MLO, we cannot use vif->bss_conf.chandef.chan->band, since that will lead to a NULL-ptr dereference as bss_conf isn't used. However, in case of real MLO, we also need to take both LMACs into account if they exist, since the station might be active on both LMACs at the same time.
5.5 Medium
CVSS3