CVE-2026-98189

Kernel memory corruption via oversized SDIO RX transfer

Published Oct 6, 2026 · Updated Oct 6, 2026

An out-of-bounds write in the Linux wilc1000 Wi-Fi driver allows context-dependent attackers to corrupt kernel memory via a bogus SDIO transfer size. In wilc_wlan_handle_isr_ext(), the driver trusts the device-reported length and reads into a 96 KB RX buffer without checking that the transfer fits. Exploitation requires control of the WILC device's reported interrupt status; the published patch does not establish a trigger through ordinary network traffic.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the Linux wilc1000 Wi-Fi driver allows context-dependent attackers to corrupt kernel memory via a bogus SDIO transfer size. In wilc_wlan_handle_isr_ext(), the driver trusts the device-reported length and reads into a 96 KB RX buffer without checking that the transfer fits. Exploitation requires control of the WILC device's reported interrupt status; the published patch does not establish a trigger through ordinary network traffic.

The record

CVE
CVE-2026-98189
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2
  2. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <14dcf4c3d74c878175b19d3da5986f83f26b1dd5
  3. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <304a5d72a04a3979a6434088c8d9c5172c2a908e
  4. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <3ddb88e237bc1e59fd37b1cf369f3b6c2dedae26
  5. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <4f86fb6f9dce04f697da85806ad96a932fc2f079
  6. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <612ed9224eae70c53c0c88cb0990e0f9b709280a
  7. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <9f6a276ade936a8803f9f3df217c2368944dc321
  8. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <aeb44a456d126d89863230eef0187e77e6441995
  9. Affected versionversion=c5c77ba18ea66aa05441c71e38473efb787705a4 <c1ba7f7f18465e259cf1b4d9c73fc73853d7f790

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <14dcf4c3d74c878175b19d3da5986f83f26b1dd5; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <304a5d72a04a3979a6434088c8d9c5172c2a908e; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <3ddb88e237bc1e59fd37b1cf369f3b6c2dedae26; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <4f86fb6f9dce04f697da85806ad96a932fc2f079; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <612ed9224eae70c53c0c88cb0990e0f9b709280a; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <9f6a276ade936a8803f9f3df217c2368944dc321; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <aeb44a456d126d89863230eef0187e77e6441995; version=c5c77ba18ea66aa05441c71e38473efb787705a4 <c1ba7f7f18465e259cf1b4d9c73fc73853d7f790

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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