{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80795",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80795"
  ],
  "published": "2026-09-04T15:14:07Z",
  "summary": "nfc: nci: fix out-of-bounds write in nci_target_auto_activated()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix out-of-bounds write in nci_target_auto_activated()\n\nnci_target_auto_activated() appends a target to the fixed-size array\nndev->targets[NCI_MAX_DISCOVERED_TARGETS] and increments ndev->n_targets\nwithout first checking the array is full; unlike its sibling\nnci_add_new_target(), which bails out when n_targets already equals\nNCI_MAX_DISCOVERED_TARGETS.\n\nndev->n_targets is only cleared by nci_clear_target_list(), so an NFCC\nthat repeatedly re-runs discovery (RF_DISCOVER_RSP, which re-enters\nNCI_DISCOVERY without clearing the target list) and reports an\nauto-activated target (RF_INTF_ACTIVATED_NTF) drives n_targets past the\nlimit. The append then writes a struct nfc_target past the end of the\narray (a slab out-of-bounds write), and nfc_targets_found() goes on to\nwalk the array with the inflated count:\n\n  BUG: KASAN: slab-out-of-bounds in nci_add_new_protocol+0x94/0x2ac [nci]\n  Write of size 2 at addr ffff0000c7299a18 by task kworker/u8:0/12\n  Workqueue: nfc0_nci_rx_wq nci_rx_work [nci]\n  Call trace:\n   nci_add_new_protocol+0x94/0x2ac [nci]\n   nci_ntf_packet+0xddc/0x11a0 [nci]\n   nci_rx_work+0x15c/0x1e0 [nci]\n   process_one_work+0x2dc/0x500\n   worker_thread+0x240/0x460\n   kthread+0x1c0/0x1d0\n   ret_from_fork+0x10/0x20\n\n  The buggy address belongs to the cache kmalloc-2k of size 2048\n  The buggy address is located 1024 bytes to the right of\n  allocated 1560-byte region [ffff0000c7299000, ffff0000c7299618)\n\nGuard nci_target_auto_activated() with the same check used by\nnci_add_new_target().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.185",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80795"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0dc59de0075f88404a0f4a2b5233104ef459fbb2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/94530ffabfca57e9bff1d207106010014cc84032"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/afd8605fb43becb892311102844955c3b127fc7e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/24761d3a5f692df5f7d848caeabcb2afd10917aa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/50e87e1c0e18d791dcd7dccf30f9a2f3e2cf3951"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2f08dbce3b37624ec6b424d759336a99586170ec"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d7083f41c21b30582e91b2e6de4d54dce74f6f9c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/129032c0616d83a5e3e304f6ebf88f14ba01e5f7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ac200079db50af81e6b04d058b33ec92901d8edd"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-04T15:14:07Z"
  }
}