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CVE-2026-74577 net: mpls: initialize rtm_tos in mpls_getroute()

🗓️ 15 Aug 2026 12:28:14Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 47 Views

Linux kernel MPLS module leaks one uninitialized heap byte via rtm_tos field in netlink route replies.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mpls/af_mpls.c"
    ],
    "versions": [
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "248718fd88b146d8bdc7610ecd1eb4cd16e0b5a1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "466b474a8deb0c93b5280c6d261e5eda6482eca7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "ba56f88aab18d982f2a21f11390f4d8a8897782a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "95651461cf77cc6590fa08c87667717e5dcfa55d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "1fea5ff0eb4aa7e951bb3d380248566c473aa377",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "a5cdd2407dd890f741f59b8367e4c6c101cce154",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "2dc2fffc704a4365cae1aae078ba62223aaeff93",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "397fc9e5cefee0c33b86811fbddb0decb7288c52",
        "lessThan": "295dd295e2137e10e9a5b1891d97e0f08de76f03",
        "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/mpls/af_mpls.c"
    ],
    "versions": [
      {
        "version": "4.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.265",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.216",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.183",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.151",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.103",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.44",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.8",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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