CVE-2026-64096 batman-adv: mcast: fix use-after-free in orig_node RCU release

[
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    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/batman-adv/originator.c"
    ],
    "versions": [
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    "programFiles": [
      "net/batman-adv/originator.c"
    ],
    "versions": [
      {
        "version": "3.15",
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      },
      {
        "version": "0",
        "lessThan": "3.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.258",
        "lessThanOrEqual": "5.10.*",
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      },
      {
        "version": "5.15.209",
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      },
      {
        "version": "6.1.175",
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      {
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      {
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      {
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      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
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    ]
  }
]