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Review reviewHigh

CVE-2025-39957

Linux 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.

CVSS
7.8
EPSS
0.14%
4.12% percentile
CISA KEV
Not listed
Published
2025.10.09
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 0333a81bc83431d7f90391d38aa09e856c5e5b25 < 93e063f15e17acb8cd6ac90c8f0802c2624e1a74, >= 0333a81bc83431d7f90391d38aa09e856c5e5b25 < 32adb020b0c32939da1322dcc87fc0ae2bc935d1, >= 0333a81bc83431d7f90391d38aa09e856c5e5b25 < 0dbad5f5549e54ac269cc04ce89f212892a98cab, >= 0333a81bc83431d7f90391d38aa09e856c5e5b25 < 7e2f3213e85eba00acb4cfe6d71647892d63c3a1, >= 6.4, >= 6.4 < 6.6.108, >= 6.7 < 6.12.49, >= 6.13 < 6.16.9, 6.17
Fixed versions
6.6.108, 6.12.49, 6.16.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available