Unknown

CVE-2026-98189 — wifi: wilc1000: fix RX buffer OOB-write in wilc_wlan_handle_isr_ext()

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix RX buffer OOB-write in wilc_wlan_handle_isr_ext() wilc_wlan_handle_isr_ext() takes the RX transfer size from the device-reported interrupt status register (a 15-bit field shifted left by 2, up to 131068 bytes) and reads that many bytes from the device into rx_buffer, which is only WILC_RX_BUFF_SIZE (96K) large. The wrap check only handles the current offset; the size itself is never compared against the buffer, so a bogus SDIO device can make the driver OOB-write rx_buffer by up to ~32K with data it controls. The oversized transfer also leaves rx_buffer_offset past the end of the buffer, after which the unsigned wrap check stops working and the overflow can repeat. Drop any transfer whose size exceeds the RX buffer, acknowledging the data interrupt and re-arming the RX engine so the bogus frame is discarded and reception can continue. This also restores the rx_buffer_offset <= WILC_RX_BUFF_SIZE invariant the wrap check relies on. This is not expected to change driver behavior in most cases: without this check, an oversized transfer would most likely corrupt neighboring kernel memory instead of completing anyway, and the drop path performs the same interrupt acknowledgment and RX engine re-arming as the normal path, so subsequent transfers are received unaffected. Discovered by Atuin - Automated Vulnerability Discovery Engine.

Published Oct 6, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 15, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < 3ddb88e237bc1e59fd37b1cf369f3b6c2dedae26≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < 9f6a276ade936a8803f9f3df217c2368944dc321≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < aeb44a456d126d89863230eef0187e77e6441995≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < 612ed9224eae70c53c0c88cb0990e0f9b709280a≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < 304a5d72a04a3979a6434088c8d9c5172c2a908e≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < 4f86fb6f9dce04f697da85806ad96a932fc2f079≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < 14dcf4c3d74c878175b19d3da5986f83f26b1dd5≥ c5c77ba18ea66aa05441c71e38473efb787705a4 and < c1ba7f7f18465e259cf1b4d9c73fc73853d7f790 and 1 more version 4.2	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 13, 2026
Affected products added · linux/linux
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Oct 6, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

8 on the record

git.kernel.org/stable/c/14dcf4c3d74c878175b19d3da5986f83f26b1dd5
NIST National Vulnerability Database
git.kernel.org/stable/c/c1ba7f7f18465e259cf1b4d9c73fc73853d7f790
NIST National Vulnerability Database
git.kernel.org/stable/c/612ed9224eae70c53c0c88cb0990e0f9b709280a
NIST National Vulnerability Database
git.kernel.org/stable/c/3ddb88e237bc1e59fd37b1cf369f3b6c2dedae26
NIST National Vulnerability Database
git.kernel.org/stable/c/9f6a276ade936a8803f9f3df217c2368944dc321
NIST National Vulnerability Database
git.kernel.org/stable/c/aeb44a456d126d89863230eef0187e77e6441995
NIST National Vulnerability Database
git.kernel.org/stable/c/304a5d72a04a3979a6434088c8d9c5172c2a908e
NIST National Vulnerability Database
git.kernel.org/stable/c/4f86fb6f9dce04f697da85806ad96a932fc2f079
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 15h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 15h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-98189 is "wifi: wilc1000: fix RX buffer OOB-write in wilc_wlan_handle_isr_ext()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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