CVE-2026-63943
In the Linux kernel, the following vulnerability has been resolved: Input: xpad - fix out-of-bounds access for Share button xpadone_process_packet() receives len directly from urb->actual_length and uses it to index the share-button byte at data[len - 18] or data[len - 26]. Since both len and data[0] are under the device's control, a broken controller can send a GIP_CMD_INPUT packet with actual_length < 18 (e.g. 5 bytes) and reach this code path, causing accesses beyond the actual array. Fix this by calculating the offset and checking bounds against the packet length.
Affected versions
Linux kernel versions
6.6.91,
6.12.29,
6.14.7,
6.15
and later are affected. Fixed in
6.6.143,
6.12.93,
6.18.35,
7.0.12,
7.1
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-63943?
CVE-2026-63943 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.6.91 onward and has been patched in 6.6.143, 6.12.93, 6.18.35 and others. CVE-2026-63943 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-63943?
Yes — CVE-2026-63943 has been patched. Fixed versions include 6.6.143, 6.12.93, 6.18.35 and others. If you are running Linux kernel 6.6.91 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-63943 actively exploited?
No — CVE-2026-63943 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.