What is CVE-2025-39957?

CVE-2025-39957 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.4 onward and patched in 6.6.108, 6.12.49, 6.16.9 and others. CVE-2025-39957 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39957?

CVE-2025-39957 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2025-39957?

Yes, CVE-2025-39957 has been patched. Fixed versions include 6.6.108, 6.12.49, 6.16.9 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39957 actively exploited?

CVE-2025-39957 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-39957

High

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.

Package Linux Kernel

Published 2025-10-09

Last modified 2026-02-26

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.4 and later are affected. Fixed in 6.6.108, 6.12.49, 6.16.9, 6.17 and their respective stable series.

Affected from

≥ 6.4

Fixed in

✓ 6.6.108 6.6.x ✓ 6.12.49 6.12.x ✓ 6.16.9 6.16.x ✓ 6.17

References

The following references provide additional information about CVE-2025-39957 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0dbad5f5549e54ac269cc04ce89f212892a98cab
Patch
Kernel patch commit
https://git.kernel.org/stable/c/32adb020b0c32939da1322dcc87fc0ae2bc935d1
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7e2f3213e85eba00acb4cfe6d71647892d63c3a1
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2025-39957

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-10-09

Modified 2026-02-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39957?

CVE-2025-39957 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.4 onward and has been patched in 6.6.108, 6.12.49, 6.16.9 and others. CVE-2025-39957 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39957?

CVE-2025-39957 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2025-39957?

Yes — CVE-2025-39957 has been patched. Fixed versions include 6.6.108, 6.12.49, 6.16.9 and others. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39957 actively exploited?

No — CVE-2025-39957 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.