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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00049.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < 9da4a0411f3455e3885831d0758bee3e3d565bbc
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < 61a7e15d55fae329a245535c3bac494e401005b8
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < bef2f478513e7367ef3b05441f6afca981de29be
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < 8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < aea9e64dec2cc6cd742e07ecd4e6236fc76b389b
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < 755019e37815a66bb0a23893debbd3dd640ccbd3
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < e491285b4d08884b622638be8e4961eb43b0af64
361f3cb7f9cfdb82c80926d0e7843c098c034545 affected < 9f28157778ede0d4f183f7ab3b46995bb400abbe
Linux Linux affected
Version Status Constraints
3.3 affected —
0 unaffected < 3.3
4.9.337 unaffected ≤ 4.9.*
4.14.303 unaffected ≤ 4.14.*
4.19.270 unaffected ≤ 4.19.*
5.4.229 unaffected ≤ 5.4.*
5.10.163 unaffected ≤ 5.10.*
5.15.86 unaffected ≤ 5.15.*
6.0.16 unaffected ≤ 6.0.*
6.1.2 unaffected ≤ 6.1.*
6.2 unaffected ≤ *

No data.

No data.

No data.

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Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8 cve-icon cve-icon
https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3 cve-icon cve-icon
https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03 cve-icon cve-icon
https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc cve-icon cve-icon
https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe cve-icon cve-icon
https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6 cve-icon cve-icon
https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b cve-icon cve-icon
https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be cve-icon cve-icon
https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025120938-CVE-2022-50656-4655@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50656 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50656 cve-icon
History

Wed, 10 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Tue, 09 Dec 2025 00:30:00 +0000

Type Values Removed Values Added
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
Title nfc: pn533: Clear nfc_target before being used
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-09T00:00:31.691Z

Reserved: 2025-12-08T23:57:43.372Z

Link: CVE-2022-50656

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-09T01:16:48.600

Modified: 2025-12-09T18:37:13.640

Link: CVE-2022-50656

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-09T00:00:00Z

Links: CVE-2022-50656 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.