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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f affected < cea949203faef9cb783adc7b978cce056271e057
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f affected < 156b6f0aec6108909b0c4aedc78865b12766b347
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f affected < bd24d92af4ae021b6209f28e9a57e1bf2260d4fd
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f affected < 0edd1e21587b0483c7ceb993b9fb9668bbef7433
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f affected < 5af2719b460ab904c504fc069d1dd2a3aa2b22b0
c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f affected < 288a81a8507052bcfbf884d39a463c44c42c5fd9
Linux Linux affected
Version Status Constraints
4.13 affected —
0 unaffected < 4.13
6.1.176 unaffected ≤ 6.1.*
6.6.143 unaffected ≤ 6.6.*
6.12.93 unaffected ≤ 6.12.*
6.18.35 unaffected ≤ 6.18.*
7.0.12 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433 cve-icon
https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347 cve-icon
https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9 cve-icon
https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0 cve-icon
https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd cve-icon
https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057 cve-icon
History

Sun, 19 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title usb: typec: ucsi: validate connector number in ucsi_connector_change()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-20T06:41:38.075Z

Reserved: 2026-07-19T07:54:57.023Z

Link: CVE-2026-63958

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.