# CVE-2022-50656: linux: In the Linux kernel, the following vulnerability has been resolved:  nfc: pn533: Clear nfc_target before being used...

CVE-2022-50656 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50656, released December 9, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-50656
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 9, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  nfc: pn533: Clear nfc_target before being used  Fix a slab-out-of-bounds read that occurs in nla_put() called from nfc_genl_send_target() when target->sensb_res_len, which is duplicated from an nfc_target in pn533, is too large as the nfc_target is not properly initialized and retains garbage values. Clear nfc_targets with memset() before they are used.  Found by a modified version of syzkaller.  BUG: KASAN: slab-out-of-bounds in nla_put Call Trace:  memcpy  nla_put  nfc_genl_dump_targets  genl_lock_dumpit  netlink_dump  __netlink_dump_start  genl_family_rcv_msg_dumpit  genl_rcv_msg  netlink_rcv_skb  genl_rcv  netlink_unicast  netlink_sendmsg  sock_sendmsg  ____sys_sendmsg  ___sys_sendmsg  __sys_sendmsg  do_syscall_64

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.4-1 | [DEBIAN-CVE-2022-50656](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50656.md) | Dec 9, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.4-1 | [DEBIAN-CVE-2022-50656](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50656.md) | Dec 9, 2025 |
| Linux | linux Debian 14 | 6.1.4-1 | [DEBIAN-CVE-2022-50656](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50656.md) | Dec 9, 2025 |

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