Linux Kernel up to 6.1.159/6.6.119/6.12.64/6.18.3/6.19-rc3 mac80211 privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.09

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.1.159/6.6.119/6.12.64/6.18.3/6.19-rc3. It has been classified as critical. The impacted element is an unknown function of the component mac80211. Performing a manipulation results in an unknown weakness. This vulnerability was named CVE-2025-71127. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.1.159/6.6.119/6.12.64/6.18.3/6.19-rc3. This affects an unknown code block of the component mac80211. The impact remains unknown. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-71127 since 01/13/2026. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 298680 (Debian dla-4475 : ata-modules-5.10.0-35-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.160, 6.6.120, 6.12.65, 6.18.4 or 6.19-rc4 eliminates this vulnerability. Applying the patch 88aab153d1528bc559292a12fb5105ee97528e1f/6e5bff40bb38741e40c33043ba0816fba5f93661/7b240a8935d554ad36a52c2c37c32039f9afaef2/a21704df4024708be698fb3fd5830d5b113b70e0/193d18f60588e95d62e0f82b6a53893e5f2f19f8 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (298680), EUVD (EUVD-2026-2465) and CERT Bund (WID-SEC-2026-0119). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 298680
Nessus Name: Debian dla-4475 : ata-modules-5.10.0-35-armmp-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.160/6.6.120/6.12.65/6.18.4/6.19-rc4
Patch: 88aab153d1528bc559292a12fb5105ee97528e1f/6e5bff40bb38741e40c33043ba0816fba5f93661/7b240a8935d554ad36a52c2c37c32039f9afaef2/a21704df4024708be698fb3fd5830d5b113b70e0/193d18f60588e95d62e0f82b6a53893e5f2f19f8

Timelineinfo

01/13/2026 CVE reserved
01/14/2026 +1 days Advisory disclosed
01/14/2026 +0 days VulDB entry created
03/25/2026 +70 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71127 (🔒)
GCVE (CVE): GCVE-0-2025-71127
GCVE (VulDB): GCVE-100-341073
EUVD: 🔒
CERT Bund: WID-SEC-2026-0119 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/14/2026 17:27
Updated: 03/25/2026 22:03
Changes: 01/14/2026 17:27 (57), 01/16/2026 05:59 (7), 01/20/2026 10:53 (1), 02/16/2026 14:08 (2), 03/25/2026 22:03 (10)
Complete: 🔍
Cache ID: 216:B06:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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