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CVE-2026-68165

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

mm/damon/core: validate ranges in damon_set_regions()

DAMON core logic assumes zero length regions don't exist. However, a few DAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT allow users to set empty monitoring target regions. This could result in WARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and divide-by-zero from damon_merge_two_regions().

For example, the WANR_ONCE() can be triggered like below.

All DAMON API callers eventually use damon_set_regions() to setup the regions. Add the validation logic in the function.

Detalles técnicos trazas, registros y código del informe original
    # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r)
    # CONFIG_DAMON_DEBUG_SANITY=y
    # damo start
    # cd /sys/kernel/mm/damon/admin/kdamonds/0
    # echo 0 > contexts/0/targets/0/regions/0/start
    # echo 0 > contexts/0/targets/0/regions/0/end
    # echo commit > state
    # dmesg
    [....]
    [   73.705780] ------------[ cut here ]------------
    [   73.707552] start 0 >= end 0
    [   73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758
    [...]

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-68165",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "43b0536cb4710e7bb591edfda7e68a1c327a3409",
              "lessThan": "71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "43b0536cb4710e7bb591edfda7e68a1c327a3409",
              "lessThan": "b585facbafbb5cf117b37b1c75819ac046646c27",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "43b0536cb4710e7bb591edfda7e68a1c327a3409",
              "lessThan": "c927b73a5694c735314ea10e7c81c07f9bd51ad7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "43b0536cb4710e7bb591edfda7e68a1c327a3409",
              "lessThan": "4b6f1d6d5d07855bd1bb9e64922b049062138bfa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "43b0536cb4710e7bb591edfda7e68a1c327a3409",
              "lessThan": "43aaddd0fa92010a68adeda7744c7cf497a1c8e9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "43b0536cb4710e7bb591edfda7e68a1c327a3409",
              "lessThan": "1292c0ecb1caefb8ca064a3639d5673991e8810c",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "mm/damon/core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "mm/damon/core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:02.973",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-08-19T17:20:33.833",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}