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NVD / CVE Program· CNA Linux

CVE-2025-39952: wifi: wilc1000: avoid buffer overflow in WID string configuration

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.29% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2203ef417044b10a8563ade6a17c74183745d72e, 5f1578a8684794318a60a022cedbffaa3dc444ce, 6085291a1a5865d4ad70f0e5812d524ebd5d1711.

Low priority for now. Upgrade to Linux Linux 2203ef417044b10a8563ade6a17c74183745d72e, 5f1578a8684794318a60a022cedbffaa3dc444ce, 6085291a1a5865d4ad70f0e5812d524ebd5d1711 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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'.

Published
Oct 4, 2025
Updated
Oct 30, 2026
EPSS
0.2% · 22th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
7.8
CNA · Linux
8.8
1.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.2affected
    • c5c77ba18ea66aa05441c71e38473efb787705a4 and later · before 5f1578a8684794318a60a022cedbffaa3dc444ceaffected · git
    • c5c77ba18ea66aa05441c71e38473efb787705a4 and later · before 6085291a1a5865d4ad70f0e5812d524ebd5d1711affected · git
    • c5c77ba18ea66aa05441c71e38473efb787705a4 and later · before 2203ef417044b10a8563ade6a17c74183745d72eaffected · git
    • c5c77ba18ea66aa05441c71e38473efb787705a4 and later · before ae50f8562306a7ea1cf3c9722f97ee244f974729affected · git
    • c5c77ba18ea66aa05441c71e38473efb787705a4 and later · before fe9e4d0c39311d0f97b024147a0d155333f388b5affected · git
    • before 4.2not affected · semver
    • 6.1.191 and later · up to and including 6.1.*not affected · semver
    • 6.6.108 and later · up to and including 6.6.*not affected · semver
    • 6.12.49 and later · up to and including 6.12.*not affected · semver
Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.2 and later · before 6.6.108
  • linux linux kernel6.7 and later · before 6.12.49
  • linux linux kernel6.13 and later · before 6.16.9
  • linux linux kernel6.17

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.57-16.12.57-1
Debian:14linuxbefore 6.16.9-16.16.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-39950Oct 4, 2025 · net/tcp: Fix a NULL pointer dereference when using TCP-AO with TCP_REPAIR
    22Monitor
  • ← EarlierCVE-2025-39951Oct 4, 2025 · um: virtio_uml: Fix use-after-free after put_device in probe
    31Monitor
  • Later →CVE-2025-39953Oct 4, 2025 · cgroup: split cgroup_destroy_wq into 3 workqueues
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux2203ef417044b10a8563ade6a17c74183745d72eVendor (CNA)
Linux Linux5f1578a8684794318a60a022cedbffaa3dc444ceVendor (CNA)
Linux Linux6085291a1a5865d4ad70f0e5812d524ebd5d1711Vendor (CNA)
Linux Linuxae50f8562306a7ea1cf3c9722f97ee244f974729Vendor (CNA)
Linux Linuxfe9e4d0c39311d0f97b024147a0d155333f388b5Vendor (CNA)
debian:linux6.12.57-1 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records