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CVE-2026-80846

Estado: RecibidaSin puntuar—

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

xfrm: drop ESP-in-TCP packets with no ingress device

ESP-in-TCP receives records through the TCP strparser. handle_esp() restores skb->dev from the saved skb_iif before passing the packet into the XFRM input path.

Queued TCP data can be processed after the original ingress device has been removed, for example during veth or net namespace teardown. In that case dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input paths both expect skb->dev to be valid while building the route lookup, so queued ESP-in-TCP data can dereference a NULL device.

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Drop the packet if the saved ingress device can no longer be resolved. Such a packet can no longer be routed through the normal XFRM receive path, and this preserves the existing behaviour for packets whose ingress device still exists.

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)

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{
  "id": "CVE-2026-80846",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "0",
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              "version": "5.10.269",
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              "versionType": "semver",
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              "version": "6.1.187",
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            },
            {
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              "version": "7.1.13",
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            },
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              "version": "7.2.3",
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            },
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              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/xfrm/espintcp.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-04T16:18:13.290",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/239d0f71af09dc2029fd4d730cb24b8c83aaa43a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e1d7c5ac1c246ce5775f604515de0a59fbf2116e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/f00235f9d12301183d61f75fbe4105506f3e5140",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: drop ESP-in-TCP packets with no ingress device\n\nESP-in-TCP receives records through the TCP strparser. handle_esp()\nrestores skb->dev from the saved skb_iif before passing the packet into\nthe XFRM input path.\n\nQueued TCP data can be processed after the original ingress device has\nbeen removed, for example during veth or net namespace teardown. In that\ncase dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input\npaths both expect skb->dev to be valid while building the route lookup,\nso queued ESP-in-TCP data can dereference a NULL device.\n\nDrop the packet if the saved ingress device can no longer be resolved.\nSuch a packet can no longer be routed through the normal XFRM receive\npath, and this preserves the existing behaviour for packets whose ingress\ndevice still exists."
    }
  ],
  "lastModified": "2026-09-04T16:18:13.290",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}