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CVE-2026-63982

Estado: Pendiente de análisisSin puntuar—

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

net/sched: Fix ethx:ingress -> ethy:egress -> ethx:ingress mirred loop

When mirred redirects to ingress (from either ingress or egress) the loop state from sched_mirred_dev array dev is lost because of 1) the packet deferral into the backlog and 2) the fact the sched_mirred_dev array is cleared. In such cases, if there was a loop we won't discover it.

Here's a simple test to reproduce: ip a add dev port0 10.10.10.11/24

tc qdisc add dev port0 clsact tc filter add dev port0 egress protocol ip \ prio 10 matchall action mirred ingress redirect dev port1

Leer descripción completaMostrar menos

tc qdisc add dev port1 clsact tc filter add dev port1 ingress protocol ip \ prio 10 matchall action mirred egress redirect dev port0

ping -c 1 -W0.01 10.10.10.10

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-2026-63982",
  "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": "906736728cea480a85803c67fafb1b0e78491922",
              "lessThan": "66f4607fe788fc7d81bce0e2f7b3726ed2f71284",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fe946a751d9b52b7c45ca34899723b314b79b249",
              "lessThan": "45ac526a0d5733c3695946bd84ec57f24d8f5e66",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fe946a751d9b52b7c45ca34899723b314b79b249",
              "lessThan": "db875221ab08d213a83bf30196ae8b64d55a3403",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/sched/act_mirred.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.19",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/sched/act_mirred.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-19T16:17:17.390",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/45ac526a0d5733c3695946bd84ec57f24d8f5e66",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/66f4607fe788fc7d81bce0e2f7b3726ed2f71284",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/db875221ab08d213a83bf30196ae8b64d55a3403",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: Fix ethx:ingress -> ethy:egress -> ethx:ingress mirred loop\n\nWhen mirred redirects to ingress (from either ingress or egress) the loop\nstate from sched_mirred_dev array dev is lost because of 1) the packet\ndeferral into the backlog and 2) the fact the sched_mirred_dev array is\ncleared. In such cases, if there was a loop we won't discover it.\n\nHere's a simple test to reproduce:\nip a add dev port0 10.10.10.11/24\n\ntc qdisc add dev port0 clsact\ntc filter add dev port0 egress protocol ip \\\n   prio 10 matchall action mirred ingress redirect dev port1\n\ntc qdisc add dev port1 clsact\ntc filter add dev port1 ingress protocol ip \\\n   prio 10 matchall action mirred egress redirect dev port0\n\nping -c 1 -W0.01 10.10.10.10"
    }
  ],
  "lastModified": "2026-07-30T14:51:11.223",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}