CVE-2026-63959
N/AIn the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT A broken/malicious port can transmit a CRC-valid frame whose header advertises up to seven data objects but whose body carries fewer than that. Check for this, and rightfully reject the message, instead of reading from uninitialized stack memory.
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 · 10th 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-2026-63959/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-2026-63959/poc.json
References
Technical & other
- https://git.kernel.org/stable/c/0af00f1459f5dd757f0d392f8caa38039561ac62
- https://git.kernel.org/stable/c/dc17721d42e6d89f63572e63add8306a0e15eb3c
- https://git.kernel.org/stable/c/9b496e3371c04f0a03b7faa5d2442536d00e3998
- https://git.kernel.org/stable/c/c4ab8e2d4432abb646c5c0687f8dab173da901f9
- https://git.kernel.org/stable/c/aa2f716327be1818e1cb156da8a2844804aaec2f