GHSA-FQJ4-9QJ3-355R

Vulnerability from github – Published: 2025-12-09 03:31 – Updated: 2025-12-09 03:31
VLAI?
Details

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 _syssendmsg _sys_sendmsg __sys_sendmsg do_syscall_64

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50656"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-09T01:16:48Z",
    "severity": null
  },
  "details": "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",
  "id": "GHSA-fqj4-9qj3-355r",
  "modified": "2025-12-09T03:31:10Z",
  "published": "2025-12-09T03:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50656"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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