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CVE-2026-63969

Estado: Pendiente de análisisSin puntuar—

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

ipv6: fix possible infinite loop in rt6_fill_node()

Sashiko reported this issue [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()").

Writers holding tb6_lock can list_del_rcu(&rt->fib6_siblings) without waiting for RCU readers; rt->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &rt->fib6_siblings, causing a CPU stall. fib6_del_route() always WRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal.

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[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev

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-2026-63969",
  "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": "d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2",
              "lessThan": "b014a63d2f2c2c767762b548381882dfb1655529",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "52da02521ede55fb86546c3fffd9377b3261b91f",
              "lessThan": "279853aec9f58d5cd723e6e5617c1c3337b30383",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "34a949e7a0869dfa31a40416d2a56973fae1807b",
              "lessThan": "c65b1f60237daac7c56c2652e064cc566a45dc81",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d9ccb18f83ea2bb654289b6ecf014fd267cc988b",
              "lessThan": "dc36a04621dcc2447dae428709207810b6c06e14",
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            {
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            {
              "status": "affected",
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            {
              "status": "affected",
              "version": "11edcd026012ac18acee0f1514db3ed1b160fc6f",
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            },
            {
              "status": "affected",
              "version": "6.1.128",
              "lessThan": "6.1.176",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.6.75",
              "lessThan": "6.6.143",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.12.2",
              "lessThan": "6.12.93",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.11.11",
              "lessThan": "6.12",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/ipv6/route.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.13",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/ipv6/route.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-19T16:17:15.947",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/279853aec9f58d5cd723e6e5617c1c3337b30383",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5e40de719ee76b8d96e2556ce36dbd3bd07bf37d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9f72412bcf60144f252b0d6205106abf14344abc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b014a63d2f2c2c767762b548381882dfb1655529",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c65b1f60237daac7c56c2652e064cc566a45dc81",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dc36a04621dcc2447dae428709207810b6c06e14",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible infinite loop in rt6_fill_node()\n\nSashiko reported this issue [1]. Apply the same fix as\ncommit f8d8ce1b515a (\"ipv6: fix possible infinite loop in fib6_info_uses_dev()\").\n\nWriters holding tb6_lock can list_del_rcu(&rt->fib6_siblings)\nwithout waiting for RCU readers; rt->fib6_siblings.next then still\npoints into the old ring and this softirq-side walker never reaches\n&rt->fib6_siblings, causing a CPU stall. fib6_del_route() always\nWRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an\ninside-loop check is a reliable detach signal.\n\n[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev"
    }
  ],
  "lastModified": "2026-07-30T14:51:11.223",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}