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Review reviewHigh

CVE-2025-39952

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: avoid buffer overflow in WID string configuration Fix the following copy overflow warning identified by Smatch checker. drivers/net/wireless/microchip/wilc1000/wlan_cfg.c:184 wilc_wlan_parse_response_frame() error: '__memcpy()' 'cfg->s[i]->str' copy overflow (512 vs 65537) This patch introduces size check before accessing the memory buffer. The checks are base on the WID type of received data from the firmware. For WID string configuration, the size limit is determined by individual element size in 'struct w...

CVSS
7.8
EPSS
0.21%
11.6% percentile
CISA KEV
Not listed
Published
2025.10.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.21%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: avoid buffer overflow in WID string configuration Fix the following copy overflow warning identified by Smatch checker. drivers/net/wireless/microchip/wilc1000/wlan_cfg.c:184 wilc_wlan_parse_response_frame() error: '__memcpy()' 'cfg->s[i]->str' copy overflow (512 vs 65537) This patch introduces size check before accessing the memory buffer. The checks are base on the WID type of received data from the firmware. For WID string configuration, the size limit is determined by individual element size in 'struct w...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= c5c77ba18ea66aa05441c71e38473efb787705a4 < 6085291a1a5865d4ad70f0e5812d524ebd5d1711, >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 2203ef417044b10a8563ade6a17c74183745d72e, >= c5c77ba18ea66aa05441c71e38473efb787705a4 < ae50f8562306a7ea1cf3c9722f97ee244f974729, >= c5c77ba18ea66aa05441c71e38473efb787705a4 < fe9e4d0c39311d0f97b024147a0d155333f388b5, >= 4.2, >= 4.2 < 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
CWE-787