CVE-2025-71127

Katalog CVE

CVSS 5.5 · Medium EPSS 0,23%

Kerentanan pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Discard Beacon frames to non-broadcast address Beacon frames are required to be sent to the broadcast address, see IEEE Std 802.11-2020, 11.1.3.1 ("The Address 1 field of the Beacon .. frame shall be set to the broadcast address"). A unicast Beacon frame might be used as a targeted attack to get one of the associated STAs to do something (e.g., using CSA to move it to another channel). As such, it is better have strict filtering for this on the received side and discard all Beacon frames that are sent to an unexpected address. This is even more important for cases where beacon protection is used. The current implementation in mac80211 is correctly discarding unicast Beacon frames if the Protected Frame bit in the Frame Control field is set to 0. However, if that bit is set to 1, the logic used for checking for configured BIGTK(s) does not actually work. If the driver does not have logic for dropping unicast Beacon frames with Protected Frame bit 1, these frames would be accepted in mac80211 processing as valid Beacon frames even though they are not protected. This would allow beacon protection to be bypassed. While the logic for checking beacon protection could be extended to cover this corner case, a more generic check for discard all Beacon frames based on A1=unicast address covers this without needing additional changes. Address all these issues by dropping received Beacon frames if they are sent to a non-broadcast address.

Rincian

Terbit di NVD

14 Januari 2026

Terakhir diubah

30 Juli 2026

Status NVD

Modified

CVSS 3.1

5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

EPSS (30 hari)

0,23% peluang dieksploitasi; lebih tinggi dari 12,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/0a59a3895f804469276d188effa511c72e752f35 patch
• https://git.kernel.org/stable/c/193d18f60588e95d62e0f82b6a53893e5f2f19f8 patch
• https://git.kernel.org/stable/c/6e5bff40bb38741e40c33043ba0816fba5f93661 patch
• https://git.kernel.org/stable/c/7b240a8935d554ad36a52c2c37c32039f9afaef2 patch
• https://git.kernel.org/stable/c/88aab153d1528bc559292a12fb5105ee97528e1f patch
• https://git.kernel.org/stable/c/a21704df4024708be698fb3fd5830d5b113b70e0 patch
• https://git.kernel.org/stable/c/be0974be5c42584e027883ac2af7dab5e950098c patch