CVE-2026-64543 tipc: fix use-after-free of the discoverer in tipc_disc_rcv()

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/tipc/core.c",
      "net/tipc/discover.c"
    ],
    "versions": [
      {
        "version": "25b0b9c4e835ffaa65b61c3efe2e28acf84d0259",
        "lessThan": "5e215bf1c47fdddf8203a0fe80a0ed594065f101",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "25b0b9c4e835ffaa65b61c3efe2e28acf84d0259",
        "lessThan": "ec7d54d8cc1723921d671e3272b427c96366506f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "25b0b9c4e835ffaa65b61c3efe2e28acf84d0259",
        "lessThan": "a0c5fdeb5fa257f8c6d469af266bc087cb5de6a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "25b0b9c4e835ffaa65b61c3efe2e28acf84d0259",
        "lessThan": "b65289e1c3f352a9f92c6e19713ddd647e033253",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "25b0b9c4e835ffaa65b61c3efe2e28acf84d0259",
        "lessThan": "1579342d71133da7f00daa02c75cebec7372097b",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/tipc/core.c",
      "net/tipc/discover.c"
    ],
    "versions": [
      {
        "version": "4.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]