Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_notify_common() The connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a 7-bit field (0-127) that is used to index into the connector array in ucsi_connector_change(). However, the array is only allocated for the number of connectors reported by the device (typically 2-4 entries). A malicious or malfunctioning device could report an out-of-range connector number in the CCI, causing an out-of-bounds array access in ucsi_connector_change(). Add a bounds check in ucsi_notify_common(), the central point where CCI is parsed after arriving from hardware, so that bogus connector numbers are rejected before they propagate further.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.5, < 6.12.81 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/98429e9ec89a5e3a204112dfaa2dbe6ca28493a0Patch
- https://git.kernel.org/stable/c/d2d8c17ac01a1b1f638ea5d340a884ccc5015186Patch
- https://git.kernel.org/stable/c/f4e608fe12b7ac6a4a57176ab0296bb5a110a078Patch
- https://git.kernel.org/stable/c/f6dcbf2b024d55549959402f1db6c614e51d52cbPatch
FAQ
What is CVE-2026-31729?
CVE-2026-31729 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_notify_common() The connector number extracted from CCI via UCSI_CCI_CONNECTOR...
How severe is CVE-2026-31729?
CVE-2026-31729 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31729?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.