CVE-2026-63956
N/AIn the Linux kernel, the following vulnerability has been resolved: USB: serial: cypress_m8: fix memory corruption with small endpoint Make sure that the interrupt-out endpoint max packet size is at least eight bytes to avoid user-controlled slab corruption or NULL-pointer dereference should a malicious device report a smaller size.
NO EXPLOITATION SIGNALS
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 11th percentile
○ In CISA KEV
○ Public exploit / PoC
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-63956/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-63956/poc.json
References
Technical & other
- https://git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5
- https://git.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158
- https://git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec
- https://git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9
- https://git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64
- https://git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e
- https://git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648
- https://git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047