{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "43b0536cb4710e7bb591edfda7e68a1c327a3409"
            },
            {
              "fixed": "b585facbafbb5cf117b37b1c75819ac046646c27"
            },
            {
              "fixed": "c927b73a5694c735314ea10e7c81c07f9bd51ad7"
            },
            {
              "fixed": "4b6f1d6d5d07855bd1bb9e64922b049062138bfa"
            },
            {
              "fixed": "43aaddd0fa92010a68adeda7744c7cf497a1c8e9"
            },
            {
              "fixed": "1292c0ecb1caefb8ca064a3639d5673991e8810c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68165.json"
  },
  "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 \u003e contexts/0/targets/0/regions/0/start\n    # echo 0 \u003e contexts/0/targets/0/regions/0/end\n    # echo commit \u003e state\n    # dmesg\n    [....]\n    [   73.705780] ------------[ cut here ]------------\n    [   73.707552] start 0 \u003e= 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.",
  "id": "CVE-2026-68165",
  "modified": "2026-08-12T03:51:44.702677936Z",
  "published": "2026-08-10T11:59:33.152Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68165.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68165"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "mm/damon/core: validate ranges in damon_set_regions()"
}