{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68165",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-68165"
  ],
  "published": "2026-08-10T12:08:00Z",
  "summary": "mm/damon/core: validate ranges in damon_set_regions()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: validate ranges in damon_set_regions()\n\nDAMON core logic assumes zero length regions don't exist.  However, a few\nDAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT\nallow users to set empty monitoring target regions.  This could result in\nWARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and\ndivide-by-zero from damon_merge_two_regions().\n\nFor example, the WANR_ONCE() can be triggered like below.\n\n    # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r)\n    # CONFIG_DAMON_DEBUG_SANITY=y\n    # damo start\n    # cd /sys/kernel/mm/damon/admin/kdamonds/0\n    # echo 0 > contexts/0/targets/0/regions/0/start\n    # echo 0 > contexts/0/targets/0/regions/0/end\n    # echo commit > state\n    # dmesg\n    [....]\n    [   73.705780] ------------[ cut here ]------------\n    [   73.707552] start 0 >= end 0\n    [   73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758\n    [...]\n\nAll DAMON API callers eventually use damon_set_regions() to setup the\nregions.  Add the validation logic in the function.",
  "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": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-68165"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z"
  }
}