Medium 5.5Published Jan 14, 2026

CVE-2025-71108usb: typec: ucsi: Handle incorrect num_connectors capability

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 07c8d2a109d847775b3b4e2c3294c8e1eea75432; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 58941bbb0050e365a98c64f1fc4a9a0ac127dba6; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before f72f97d0aee4a993a35f2496bca5efd24827235d; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 914605b0de8128434eafc9582445306830748b93; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 3042a57a8e8bce4a3100c3f6f03dc372aab24943; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 132fe187e0d940f388f839fe2cde9b84106ad20d; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 30cd2cb1abf4c4acdb1ddb468c946f68939819fb	CNA record
linux linux_kernel linux:linux_kernel	from 4.13.1 before 5.10.248; from 5.11 before 5.15.198; from 5.16 before 6.1.160; from 6.2 before 6.6.120; from 6.7 before 6.12.64; from 6.13 before 6.18.3; 4.13; 6.19; and 7 more ranges	NVD

References

References

https://git.kernel.org/stable/c/07c8d2a109d847775b3b4e2c3294c8e1eea75432	patch
https://git.kernel.org/stable/c/58941bbb0050e365a98c64f1fc4a9a0ac127dba6	patch
https://git.kernel.org/stable/c/f72f97d0aee4a993a35f2496bca5efd24827235d	patch
https://git.kernel.org/stable/c/914605b0de8128434eafc9582445306830748b93	patch
https://git.kernel.org/stable/c/3042a57a8e8bce4a3100c3f6f03dc372aab24943	patch
https://git.kernel.org/stable/c/132fe187e0d940f388f839fe2cde9b84106ad20d	patch
https://git.kernel.org/stable/c/30cd2cb1abf4c4acdb1ddb468c946f68939819fb	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.