CVE-2022-50656 Details
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
A slab-out-of-bounds read vulnerability has been identified in the Linux kernel's NFC PN533 driver. This issue arises in the 'nla_put()' function, called by 'nfc_genl_send_target()', when the 'sensb_res_len' of an NFC target is excessively large. The vulnerability occurs because the NFC target is not properly initialized, leaving it with garbage values. The problem can be exploited when the 'sensb_res_len' is duplicated from an improperly initialized NFC target, leading to a read beyond the allocated memory. The vulnerability was discovered using a modified version of Syzkaller, a fuzzing tool.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for upgrading the kernel can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 9, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64 | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| NFC pn533 | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 4, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 9, 2025 | New CVE Received | kernel.org |