CVE-2025-71108
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Handle incorrect num_connectors capability The UCSI spec states that the num_connectors field is 7 bits, and the 8th bit is reserved and should be set to zero. Some buggy FW has been known to set this bit, and it can lead to a system not booting. Flag that the FW is not behaving correctly, and auto-fix the value so that the system boots correctly. Found on Lenovo P1 G8 during Linux enablement program. The FW will be fixed, but seemed worth addressing in case it hit platforms that aren't officially Linux supported.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-01-14 15:15:59.867000
Last modified
2026-10-19 19:17:12.470000
View original CVE JSON
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"id": "CVE-2025-71108",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-14T15:15:59.867",
"lastModified": "2026-10-19T19:17:12.470",
"vulnStatus": "Modified",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: Handle incorrect num_connectors capability\n\nThe UCSI spec states that the num_connectors field is 7 bits, and the\n8th bit is reserved and should be set to zero.\nSome buggy FW has been known to set this bit, and it can lead to a\nsystem not booting.\nFlag that the FW is not behaving correctly, and auto-fix the value\nso that the system boots correctly.\n\nFound on Lenovo P1 G8 during Linux enablement program. The FW will\nbe fixed, but seemed worth addressing in case it hit platforms that\naren't officially Linux supported."
},
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"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nusb: typec: ucsi: Manejar capacidad incorrecta de num_connectors\n\nLa especificación UCSI establece que el campo num_connectors es de 7 bits, y el octavo bit está reservado y debe establecerse a cero.\nSe sabe que algunos FW defectuosos han establecido este bit, y esto puede llevar a que un sistema no arranque.\nIndicar que el FW no se está comportando correctamente y corregir automáticamente el valor para que el sistema arranque correctamente.\n\nEncontrado en Lenovo P1 G8 durante el programa de habilitación de Linux. El FW se corregirá, pero pareció valer la pena abordarlo en caso de que afectara a plataformas que no son oficialmente compatibles con Linux."
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