Input: xpad - fix out-of-bounds access for Share button
Summary
| CVE | CVE-2026-63943 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-19 16:17:12 UTC |
| Updated | 2026-07-19 16:17:12 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.002000000 probability, percentile 0.100210000 (date 2026-07-20)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected cbc82e7db16d59c301457312a624a7de2c03cd4a bcfb4833cd4078a1a356ef451838b75cd233099e git | Not specified |
| CNA | Linux | Linux | affected 302a0cd0bbc450998429a3f4267970a4b93251a8 37ec54abfdd63a63fd50734a9c4e4cbc1e5795af git | Not specified |
| CNA | Linux | Linux | affected 4ef46367073b107ec22f46fe5f12176e87c238e8 9749db57233b396353ad5dee81eec9d9880c9246 git | Not specified |
| CNA | Linux | Linux | affected 4ef46367073b107ec22f46fe5f12176e87c238e8 6346b0895b574ce45f3747b9c508c72f70e6abef git | Not specified |
| CNA | Linux | Linux | affected 4ef46367073b107ec22f46fe5f12176e87c238e8 6cdc46b38cf146ce81d4831b6472dbf7731849a2 git | Not specified |
| CNA | Linux | Linux | affected a7e3ddd1d9a3d0b26465ed01d464e3c05479ebc8 git | Not specified |
| CNA | Linux | Linux | affected 6.6.91 6.6.143 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.29 6.12.93 semver | Not specified |
| CNA | Linux | Linux | affected 6.14.7 6.15 semver | Not specified |
| CNA | Linux | Linux | affected 6.15 | Not specified |
| CNA | Linux | Linux | unaffected 6.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.93 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.35 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.12 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6346b0895b574ce45f3747b9c508c72f70e6abef | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6cdc46b38cf146ce81d4831b6472dbf7731849a2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9749db57233b396353ad5dee81eec9d9880c9246 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/37ec54abfdd63a63fd50734a9c4e4cbc1e5795af | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bcfb4833cd4078a1a356ef451838b75cd233099e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.