fkie_cve-2025-38184
Vulnerability from fkie_nvd
Published
2025-07-04 14:15
Modified
2025-07-08 16:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer The reproduction steps: 1. create a tun interface 2. enable l2 bearer 3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tun tipc: Started in network mode tipc: Node identity 8af312d38a21, cluster identity 4711 tipc: Enabled bearer <eth:syz_tun>, priority 1 Oops: general protection fault KASAN: null-ptr-deref in range CPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT Hardware name: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0 the ub was in fact a struct dev. when bid != 0 && skip_cnt != 0, bearer_list[bid] may be NULL or other media when other thread changes it. fix this by checking media_id.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05d332ba075753d569d66333d62d60fff5f57ad8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d3d91c3500f0c480e016faa4e2259c588616e59
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f4a72fb266e48dbe928e1d936eab149e4ac3e1b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3998283e4c32c0fe69edd59b0876c193f50abce6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8595350615f952fcf8bc861464a6bf6b1129af50
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2e17984752b9131061d1a2ca1199da2706337fd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3dfe821dfe091c0045044343c8d86596d66e2cf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer\n\nThe reproduction steps:\n1. create a tun interface\n2. enable l2 bearer\n3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tun\n\ntipc: Started in network mode\ntipc: Node identity 8af312d38a21, cluster identity 4711\ntipc: Enabled bearer \u003ceth:syz_tun\u003e, priority 1\nOops: general protection fault\nKASAN: null-ptr-deref in range\nCPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT\nHardware name: QEMU Ubuntu 24.04 PC\nRIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0\n\nthe ub was in fact a struct dev.\n\nwhen bid != 0 \u0026\u0026 skip_cnt != 0, bearer_list[bid] may be NULL or\nother media when other thread changes it.\n\nfix this by checking media_id."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: corregir null-ptr-deref al adquirir la IP remota del portador Ethernet Pasos de reproducci\u00f3n: 1. crear una interfaz tun 2. habilitar el portador l2 3. TIPC_NL_UDP_GET_REMOTEIP con el nombre del medio establecido en tun tipc: iniciado en modo de red tipc: identidad del nodo 8af312d38a21, identidad del cl\u00faster 4711 tipc: portador habilitado , prioridad 1 Oops: error de protecci\u00f3n general KASAN: null-ptr-deref en el rango CPU: 1 UID: 1000 PID: 559 Comm: poc No contaminado 6.16.0-rc1+ #117 PREEMPT Nombre del hardware: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0 el ub era de hecho un struct dev. cuando bid != 0 y skip_cnt != 0, bearer_list[bid] puede ser NULL u otro medio cuando otro hilo lo cambia. solucione esto comprobando media_id."
    }
  ],
  "id": "CVE-2025-38184",
  "lastModified": "2025-07-08T16:18:53.607",
  "metrics": {},
  "published": "2025-07-04T14:15:25.237",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/05d332ba075753d569d66333d62d60fff5f57ad8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d3d91c3500f0c480e016faa4e2259c588616e59"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0f4a72fb266e48dbe928e1d936eab149e4ac3e1b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3998283e4c32c0fe69edd59b0876c193f50abce6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8595350615f952fcf8bc861464a6bf6b1129af50"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2e17984752b9131061d1a2ca1199da2706337fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d3dfe821dfe091c0045044343c8d86596d66e2cf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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