CVE-2026-63958
- Source
- https://cve.org/CVERecord?id=CVE-2026-63958
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63958.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63958
- Downstream
- Published
- 2026-07-19T14:55:48.835Z
- Modified
- 2026-07-21T03:47:40.592130634Z
- Summary
- usb: typec: ucsi: validate connector number in ucsi_connector_change()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
usb: typec: ucsi: validate connector number in ucsiconnectorchange()
The connector number in a UCSI CCI notification is a 7-bit field supplied by the PPM. ucsiconnectorchange() 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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63958.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433
- https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347
- https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9
- https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0
- https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd
- https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63958.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63958
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc1b0bc2dabfa884dea49c02adaf3cd6b52b33d2fFixedcea949203faef9cb783adc7b978cce056271e057Fixed156b6f0aec6108909b0c4aedc78865b12766b347Fixedbd24d92af4ae021b6209f28e9a57e1bf2260d4fdFixed0edd1e21587b0483c7ceb993b9fb9668bbef7433Fixed5af2719b460ab904c504fc069d1dd2a3aa2b22b0Fixed288a81a8507052bcfbf884d39a463c44c42c5fd9