CVE-2026-89948 batman-adv: bla: fix freeing of claims on meshif deletion

[
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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/bridge_loop_avoidance.c"
    ],
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    "programFiles": [
      "net/batman-adv/bridge_loop_avoidance.c"
    ],
    "versions": [
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        "version": "3.5",
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      },
      {
        "version": "0",
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        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.270",
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      {
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      {
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      {
        "version": "7.3-rc1",
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        "versionType": "original_commit_for_fix"
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]