CVE-2025-39952High· 8.8▾ Twilight

wifi: wilc1000: avoid buffer overflow in WID string configuration

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/microchi…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score48/ 100 · Moderate

impact 48.4 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Oct 4, 2025

Updated

Oct 30, 2026

CVSS

8.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

48 · Moderate

EPSS

0.29% · p22

Platforms

—

Source

CVEORG

Vector

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

EPSS history

Exploit-prediction probability, daily snapshots since Nov 3.

0.3% → 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 395 days

Oct 4, 2025Published
Disclosed via CVEORG
Oct 30, 2026Record revised
Last analysed / modified upstream
Nov 3, 2026EPSS first tracked
0.3%

Linux #cve.org

Affected

Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 5f1578a8684794318a60a022cedbffaa3dc444ce
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 6085291a1a5865d4ad70f0e5812d524ebd5d1711
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 2203ef417044b10a8563ade6a17c74183745d72e
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < ae50f8562306a7ea1cf3c9722f97ee244f974729
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < fe9e4d0c39311d0f97b024147a0d155333f388b5
Linux 4.2

Full technical detail▾

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 wilc_cfg_str_vals' that is maintained in 'len' field of 'struct wilc_cfg_str'.

Affected

Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 5f1578a8684794318a60a022cedbffaa3dc444ce
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 6085291a1a5865d4ad70f0e5812d524ebd5d1711
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 2203ef417044b10a8563ade6a17c74183745d72e
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < ae50f8562306a7ea1cf3c9722f97ee244f974729
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < fe9e4d0c39311d0f97b024147a0d155333f388b5
Linux 4.2

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

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CVE-2025-39952High· 8.8▾ Twilight

wifi: wilc1000: avoid buffer overflow in WID string configuration

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score48/ 100 · Moderate

impact 48.4 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Oct 4, 2025

Updated

Oct 30, 2026

CVSS

8.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

48 · Moderate

EPSS

0.29% · p22

Platforms

—

Source

CVEORG

Vector

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

EPSS history

Exploit-prediction probability, daily snapshots since Nov 3.

0.3% → 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 395 days

Oct 4, 2025Published
Disclosed via CVEORG
Oct 30, 2026Record revised
Last analysed / modified upstream
Nov 3, 2026EPSS first tracked
0.3%

Linux #cve.org

Affected

Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 5f1578a8684794318a60a022cedbffaa3dc444ce
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 6085291a1a5865d4ad70f0e5812d524ebd5d1711
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 2203ef417044b10a8563ade6a17c74183745d72e
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < ae50f8562306a7ea1cf3c9722f97ee244f974729
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < fe9e4d0c39311d0f97b024147a0d155333f388b5
Linux 4.2

Full technical detail▾

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)

Affected

Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 5f1578a8684794318a60a022cedbffaa3dc444ce
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 6085291a1a5865d4ad70f0e5812d524ebd5d1711
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < 2203ef417044b10a8563ade6a17c74183745d72e
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < ae50f8562306a7ea1cf3c9722f97ee244f974729
Linux >= c5c77ba18ea66aa05441c71e38473efb787705a4 < fe9e4d0c39311d0f97b024147a0d155333f388b5
Linux 4.2

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org