CVE-2022-50656

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

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8
https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3
https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03
https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc
https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe
https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6
https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b
https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be
https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64

Configurations

No configuration.

History

No history.

Information

Published : 2025-12-09 01:16

Updated : 2026-08-04 10:18

NVD link : CVE-2022-50656

Mitre link : CVE-2022-50656

CVE.ORG link : CVE-2022-50656

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2022-50656", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "9da4a0411f3455e3885831d0758bee3e3d565bbc", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "61a7e15d55fae329a245535c3bac494e401005b8", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "bef2f478513e7367ef3b05441f6afca981de29be", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "aea9e64dec2cc6cd742e07ecd4e6236fc76b389b", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "755019e37815a66bb0a23893debbd3dd640ccbd3", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "e491285b4d08884b622638be8e4961eb43b0af64", "versionType": "git"}, {"status": "affected", "version": "361f3cb7f9cfdb82c80926d0e7843c098c034545", "lessThan": "9f28157778ede0d4f183f7ab3b46995bb400abbe", "versionType": "git"}], "programFiles": ["drivers/nfc/pn533/pn533.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.3"}, {"status": "unaffected", "version": "0", "lessThan": "3.3", "versionType": "semver"}, {"status": "unaffected", "version": "4.9.337", "versionType": "semver", "lessThanOrEqual": "4.9.*"}, {"status": "unaffected", "version": "4.14.303", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.270", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.229", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.163", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.86", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.0.16", "versionType": "semver", "lessThanOrEqual": "6.0.*"}, {"status": "unaffected", "version": "6.1.2", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/nfc/pn533/pn533.c"], "defaultStatus": "affected"}]}], "published": "2025-12-09T01:16:48.600", "references": [{"url": "https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Deferred", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: Clear nfc_target before being used\n\nFix a slab-out-of-bounds read that occurs in nla_put() called from\nnfc_genl_send_target() when target->sensb_res_len, which is duplicated\nfrom an nfc_target in pn533, is too large as the nfc_target is not\nproperly initialized and retains garbage values. Clear nfc_targets with\nmemset() before they are used.\n\nFound by a modified version of syzkaller.\n\nBUG: KASAN: slab-out-of-bounds in nla_put\nCall Trace:\n memcpy\n nla_put\n nfc_genl_dump_targets\n genl_lock_dumpit\n netlink_dump\n __netlink_dump_start\n genl_family_rcv_msg_dumpit\n genl_rcv_msg\n netlink_rcv_skb\n genl_rcv\n netlink_unicast\n netlink_sendmsg\n sock_sendmsg\n ____sys_sendmsg\n ___sys_sendmsg\n __sys_sendmsg\n do_syscall_64"}], "lastModified": "2026-08-04T10:18:20.420", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}