{
  "public_date" : "2026-04-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: NFC: digital: Bounds check NFC-A cascade depth in SDD response handler",
    "id" : "2461459",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2461459"
  },
  "cwe" : "CWE-120",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nNFC: digital: Bounds check NFC-A cascade depth in SDD response handler\nThe NFC-A anti-collision cascade in digital_in_recv_sdd_res() appends 3\nor 4 bytes to target->nfcid1 on each round, but the number of cascade\nrounds is controlled entirely by the peer device.  The peer sets the\ncascade tag in the SDD_RES (deciding 3 vs 4 bytes) and the\ncascade-incomplete bit in the SEL_RES (deciding whether another round\nfollows).\nISO 14443-3 limits NFC-A to three cascade levels and target->nfcid1 is\nsized accordingly (NFC_NFCID1_MAXSIZE = 10), but nothing in the driver\nactually enforces this.  This means a malicious peer can keep the\ncascade running, writing past the heap-allocated nfc_target with each\nround.\nFix this by rejecting the response when the accumulated UID would exceed\nthe buffer.\nCommit e329e71013c9 (\"NFC: nci: Bounds check struct nfc_target arrays\")\nfixed similar missing checks against the same field on the NCI path.", "A flaw was found in the Linux kernel's NFC (Near Field Communication) digital subsystem. A malicious peer device can exploit this vulnerability by sending specially crafted NFC-A anti-collision cascade responses. This allows the peer to exceed the intended cascade depth, leading to a heap overflow by writing past the allocated buffer for the nfc_target. This memory corruption can result in a denial of service or potentially arbitrary code execution." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-31622\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31622\nhttps://lore.kernel.org/linux-cve-announce/2026042426-CVE-2026-31622-dc00@gregkh/T" ],
  "name" : "CVE-2026-31622",
  "csaw" : false
}