CVE-2025-39957: linux kernel — Fix

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.

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CVSS v3.1 Score

7.8

HIGH

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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.4 — 6.6.108
linux	linux_kernel	6.7 — 6.12.49
linux	linux_kernel	6.13 — 6.16.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-39957? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-39957? +

CVE-2025-39957 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-39957? +

CVE-2025-39957 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-39957? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-39957