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Vulnerability record · CVE-2025-39957 · published 9 October 2025

CVE-2025-39957: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: increase scan_ies_len for S1G Currently the S1G capability element is not taken into account for the scan_ies_len, which leads to a buffer length validation failure in ieee80211_prep_hw_scan() and subsequent WARN in __ieee80211_start_scan(). This prevents hw scanning from functioning. To fix ensure we accommodate for the S1G capability length.

7.8 CVSS 3.1 High EPSS 0.15% · top 96.2%
7.8CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
30 Jul 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: increase scan_ies_len for S1G Currently the S1G capability element is not taken into account for the scan_ies_len, which leads to a buffer length validation failure in ieee80211_prep_hw_scan() and subsequent WARN in __ieee80211_start_scan(). This prevents hw scanning from functioning. To fix ensure we accommodate for the S1G capability length.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0dbad5f5549e54ac269cc04ce89f212892a98cab Patch
https://git.kernel.org/stable/c/32adb020b0c32939da1322dcc87fc0ae2bc935d1 Patch
https://git.kernel.org/stable/c/7e2f3213e85eba00acb4cfe6d71647892d63c3a1 Patch
https://git.kernel.org/stable/c/93e063f15e17acb8cd6ac90c8f0802c2624e1a74 Patch

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Source: NIST National Vulnerability Database (record CVE-2025-39957), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.