FKIE_CVE-2025-38006

Vulnerability from fkie_nvd - Published: 2025-06-18 10:15 - Updated: 2025-11-14 16:42
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mctp: Don't access ifa_index when missing In mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but only when the struct ifaddrmsg is provided. Otherwise it will be comparing to uninitialised memory - reproducible in the syzkaller case from dhcpd, or busybox "ip addr show". The kernel MCTP implementation has always filtered by ifa_index, so existing userspace programs expecting to dump MCTP addresses must already be passing a valid ifa_index value (either 0 or a real index). BUG: KMSAN: uninit-value in mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 rtnl_dump_all+0x3ec/0x5b0 net/core/rtnetlink.c:4380 rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6824 netlink_dump+0x97b/0x1690 net/netlink/af_netlink.c:2309
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24fa213dffa470166ec014f979f36c6ff44afb45Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acab78ae12c7fefb4f3bfe22e00770a5faa42724Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d4d1561d17eb72908e4489c0900d96e0484fac20Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f11cf946c0a92c560a890d68e4775723353599e1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mctp: Don\u0027t access ifa_index when missing\n\nIn mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but\nonly when the struct ifaddrmsg is provided. Otherwise it will be\ncomparing to uninitialised memory - reproducible in the syzkaller case from\ndhcpd, or busybox \"ip addr show\".\n\nThe kernel MCTP implementation has always filtered by ifa_index, so\nexisting userspace programs expecting to dump MCTP addresses must\nalready be passing a valid ifa_index value (either 0 or a real index).\n\nBUG: KMSAN: uninit-value in mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128\n mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128\n rtnl_dump_all+0x3ec/0x5b0 net/core/rtnetlink.c:4380\n rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6824\n netlink_dump+0x97b/0x1690 net/netlink/af_netlink.c:2309"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mctp: No acceder a ifa_index si falta. En mctp_dump_addrinfo, ifa_index puede usarse para filtrar interfaces, pero solo cuando se proporciona la estructura ifaddrmsg. De lo contrario, se comparar\u00e1 con memoria no inicializada, lo cual es reproducible en el caso de syzkaller desde dhcpd o \"ip addr show\" de busybox. La implementaci\u00f3n de MCTP del kernel siempre ha filtrado por ifa_index, por lo que los programas de espacio de usuario que esperan volcar direcciones MCTP ya deben estar pasando un valor v\u00e1lido de ifa_index (0 o un \u00edndice real). ERROR: KMSAN: valor no inicializado en mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 mctp_dump_addrinfo+0x208/0xac0 net/mctp/device.c:128 rtnl_dump_all+0x3ec/0x5b0 net/core/rtnetlink.c:4380 rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6824 netlink_dump+0x97b/0x1690 net/netlink/af_netlink.c:2309"
    }
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  "id": "CVE-2025-38006",
  "lastModified": "2025-11-14T16:42:01.430",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-06-18T10:15:31.773",
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}


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