Answer in brief
CVE-2026-31729 records a Unknown severity vulnerability in usb: typec: ucsi: validate connector number in ucsi_notify_common(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <f6dcbf2b024d55549959402f1db6c614e51d52cb || >=bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <f4e608fe12b7ac6a4a57176ab0296bb5a110a078 || >=bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <98429e9ec89a5e3a204112dfaa2dbe6ca28493a0 || >=bdc62f2bae8fb0e8e99574de5232f0a3c54a27df <d2d8c17ac01a1b1f638ea5d340a884ccc5015186 | f6dcbf2b024d55549959402f1db6c614e51d52cb, f4e608fe12b7ac6a4a57176ab0296bb5a110a078, 98429e9ec89a5e3a204112dfaa2dbe6ca28493a0, d2d8c17ac01a1b1f638ea5d340a884ccc5015186 |
| Linux/Linuxgeneric | 5.5 | Not reported |
Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.