# CVE-2023-53106: linux: In the Linux kernel, the following vulnerability has been resolved:  nfc: st-nci: Fix use after free bug in ndlc_remo...

CVE-2023-53106 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53106, released May 2, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-53106
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0021
- 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:  nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition  This bug influences both st_nci_i2c_remove and st_nci_spi_remove. Take st_nci_i2c_remove as an example.  In st_nci_i2c_probe, it called ndlc_probe and bound &ndlc->sm_work with llt_ndlc_sm_work.  When it calls ndlc_recv or timeout handler, it will finally call schedule_work to start the work.  When we call st_nci_i2c_remove to remove the driver, there may be a sequence as follows:  Fix it by finishing the work before cleanup in ndlc_remove  CPU0                  CPU1                      |llt_ndlc_sm_work st_nci_i2c_remove   |   ndlc_remove       |      st_nci_remove  |      nci_free_device|      kfree(ndev)    | //free ndlc->ndev   |                     |llt_ndlc_rcv_queue                     |nci_recv_frame                     |//use ndlc->ndev

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.25-1 | [DEBIAN-CVE-2023-53106](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53106.md) | May 2, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.25-1 | [DEBIAN-CVE-2023-53106](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53106.md) | May 2, 2025 |
| Linux | linux Debian 14 | 6.1.25-1 | [DEBIAN-CVE-2023-53106](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53106.md) | May 2, 2025 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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