# CVE-2023-53298: linux: In the Linux kernel, the following vulnerability has been resolved:  nfc: fix memory leak of se_io context in nfc_gen...

CVE-2023-53298 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53298, released September 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53298
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  nfc: fix memory leak of se_io context in nfc_genl_se_io  The callback context for sending/receiving APDUs to/from the selected secure element is allocated inside nfc_genl_se_io and supposed to be eventually freed in se_io_cb callback function. However, there are several error paths where the bwi_timer is not charged to call se_io_cb later, and the cb_context is leaked.  The patch proposes to free the cb_context explicitly on those error paths.  At the moment we can't simply check 'dev->ops->se_io()' return value as it may be negative in both cases: when the timer was charged and was not.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.20-1 | [DEBIAN-CVE-2023-53298](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53298.md) | Sep 16, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.20-1 | [DEBIAN-CVE-2023-53298](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53298.md) | Sep 16, 2025 |
| Linux | linux Debian 14 | 6.1.20-1 | [DEBIAN-CVE-2023-53298](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53298.md) | Sep 16, 2025 |

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