CVE-2022-50656 (GCVE-0-2022-50656)

Vulnerability from cvelistv5 – Published: 2025-12-09 00:00 – Updated: 2025-12-09 00:00
VLAI?
Title
nfc: pn533: Clear nfc_target before being used
Summary
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < 9da4a0411f3455e3885831d0758bee3e3d565bbc (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < 61a7e15d55fae329a245535c3bac494e401005b8 (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < bef2f478513e7367ef3b05441f6afca981de29be (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < 8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03 (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < aea9e64dec2cc6cd742e07ecd4e6236fc76b389b (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6 (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < 755019e37815a66bb0a23893debbd3dd640ccbd3 (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < e491285b4d08884b622638be8e4961eb43b0af64 (git)
Affected: 361f3cb7f9cfdb82c80926d0e7843c098c034545 , < 9f28157778ede0d4f183f7ab3b46995bb400abbe (git)
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    Linux Linux Affected: 3.3
Unaffected: 0 , < 3.3 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "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-\u003esensb_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"
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        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe"
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      "title": "nfc: pn533: Clear nfc_target before being used",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50656",
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    "dateReserved": "2025-12-08T23:57:43.372Z",
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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