# CVE-2023-53049: linux: In the Linux kernel, the following vulnerability has been resolved:  usb: ucsi: Fix NULL pointer deref in ucsi_connec...

CVE-2023-53049 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53049, released May 2, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53049
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 2, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()  When ucsi_init() fails, ucsi->connector is NULL, yet in case of ucsi_acpi we may still get events which cause the ucs_acpi code to call ucsi_connector_change(), which then derefs the NULL ucsi->connector pointer.  Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init() has succeeded, so that ucsi_connector_change() ignores the events because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.25-1 | [DEBIAN-CVE-2023-53049](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53049.md) | May 2, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.25-1 | [DEBIAN-CVE-2023-53049](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53049.md) | May 2, 2025 |
| Linux | linux Debian 14 | 6.1.25-1 | [DEBIAN-CVE-2023-53049](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53049.md) | May 2, 2025 |

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