wifi: wilc1000: fix RX buffer OOB-write in wilc_wlan_handle_isr_ext()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98189
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:04 UTC
Updated2026-10-06 09:18:04 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001840000 probability, percentile 0.072990000 (date 2026-10-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 3ddb88e237bc1e59fd37b1cf369f3b6c2dedae26 git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 9f6a276ade936a8803f9f3df217c2368944dc321 git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 aeb44a456d126d89863230eef0187e77e6441995 git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 612ed9224eae70c53c0c88cb0990e0f9b709280a git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 304a5d72a04a3979a6434088c8d9c5172c2a908e git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 4f86fb6f9dce04f697da85806ad96a932fc2f079 git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 14dcf4c3d74c878175b19d3da5986f83f26b1dd5 git Not specified
CNA Linux Linux affected c5c77ba18ea66aa05441c71e38473efb787705a4 c1ba7f7f18465e259cf1b4d9c73fc73853d7f790 git Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 semver Not specified
CNA Linux Linux unaffected 5.10.271 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.222 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/612ed9224eae70c53c0c88cb0990e0f9b709280a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f6a276ade936a8803f9f3df217c2368944dc321 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aeb44a456d126d89863230eef0187e77e6441995 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c1ba7f7f18465e259cf1b4d9c73fc73853d7f790 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3ddb88e237bc1e59fd37b1cf369f3b6c2dedae26 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/14dcf4c3d74c878175b19d3da5986f83f26b1dd5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4f86fb6f9dce04f697da85806ad96a932fc2f079 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/304a5d72a04a3979a6434088c8d9c5172c2a908e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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