# CVE-2021-46924: linux: In the Linux kernel, the following vulnerability has been resolved:  NFC: st21nfca: Fix memory leak in device probe a...

CVE-2021-46924 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46924, released February 27, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-46924
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 27, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  NFC: st21nfca: Fix memory leak in device probe and remove  'phy->pending_skb' is alloced when device probe, but forgot to free in the error handling path and remove path, this cause memory leak as follows:  unreferenced object 0xffff88800bc06800 (size 512):   comm "8", pid 11775, jiffies 4295159829 (age 9.032s)   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................   backtrace:     [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450     [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0     [<000000005fea522c>] __alloc_skb+0x124/0x380     [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2  Fix it by freeing 'pending_skb' in error and remove.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-46924](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46924.md) | Feb 27, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-46924](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46924.md) | Feb 27, 2024 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-46924](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46924.md) | Feb 27, 2024 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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