CVE-2026-63958

medium

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_connector_change() The connector numb…

Vendor / product: Linux — linux kernel

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_connector_change() The connector number in a UCSI CCI notification is a 7-bit field supplied by the PPM. ucsi_connector_change() uses it to index the ucsi->connector[] array without checking it against the number of connectors the PPM reported at init time, so a buggy or malicious PPM (EC firmware, or an I2C-attached UCSI controller on the ccg / stm32g0 / glink transports) can drive schedule_work() on memory past the end of the array. Reject connector numbers that are zero or exceed cap.num_connectors before dereferencing the array.

CVSS

5.5

5.5 (CVSS v3.1)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-07-19 16:17

Modified: 2026-10-30 14:32

NVD status: Analyzed

Last synced 3 days ago

Verified against the source API 2026-10-30 14:40 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥4.13 <6.1.176, ≥6.2 <6.6.143, ≥6.7 <6.12.93, ≥6.13 <6.18.35, ≥6.19 <7.0.12, 7.1

Weakness classification (CWE)

NVD-CWE-noinfo

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433

Patch / mitigation: https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347

Patch / mitigation: https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9

Patch / mitigation: https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0

Patch / mitigation: https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd

Patch / mitigation: https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057

References

https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-10-30 14:40 UTC · record ↗

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CVE-2026-63958

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Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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