fkie_cve-2022-48830
Vulnerability from fkie_nvd
Published
2024-07-16 12:15
Modified
2025-09-25 19:22
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: can: isotp: fix potential CAN frame reception race in isotp_rcv() When receiving a CAN frame the current code logic does not consider concurrently receiving processes which do not show up in real world usage. Ziyang Xuan writes: The following syz problem is one of the scenarios. so->rx.len is changed by isotp_rcv_ff() during isotp_rcv_cf(), so->rx.len equals 0 before alloc_skb() and equals 4096 after alloc_skb(). That will trigger skb_over_panic() in skb_put(). ======================================================= CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.16.0-rc8-syzkaller #0 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:113 Call Trace: <TASK> skb_over_panic net/core/skbuff.c:118 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1990 isotp_rcv_cf net/can/isotp.c:570 [inline] isotp_rcv+0xa38/0x1e30 net/can/isotp.c:668 deliver net/can/af_can.c:574 [inline] can_rcv_filter+0x445/0x8d0 net/can/af_can.c:635 can_receive+0x31d/0x580 net/can/af_can.c:665 can_rcv+0x120/0x1c0 net/can/af_can.c:696 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5465 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5579 Therefore we make sure the state changes and data structures stay consistent at CAN frame reception time by adding a spin_lock in isotp_rcv(). This fixes the issue reported by syzkaller but does not affect real world operation.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b068f33bc8acfcfd5ea7992a2dafb30d89bad30Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b53d2204ce79b27a878074a77d64f40ec21dbcaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c759040c1dd03954f650f147ae7175476d51314Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f90cc68f9f4b5d8585ad5d0a206a9d37ac299ef3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5b068f33bc8acfcfd5ea7992a2dafb30d89bad30Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7b53d2204ce79b27a878074a77d64f40ec21dbcaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7c759040c1dd03954f650f147ae7175476d51314Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f90cc68f9f4b5d8585ad5d0a206a9d37ac299ef3Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17
linux linux_kernel 5.17
linux linux_kernel 5.17


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: fix potential CAN frame reception race in isotp_rcv()\n\nWhen receiving a CAN frame the current code logic does not consider\nconcurrently receiving processes which do not show up in real world\nusage.\n\nZiyang Xuan writes:\n\nThe following syz problem is one of the scenarios. so-\u003erx.len is\nchanged by isotp_rcv_ff() during isotp_rcv_cf(), so-\u003erx.len equals\n0 before alloc_skb() and equals 4096 after alloc_skb(). That will\ntrigger skb_over_panic() in skb_put().\n\n=======================================================\nCPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.16.0-rc8-syzkaller #0\nRIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:113\nCall Trace:\n \u003cTASK\u003e\n skb_over_panic net/core/skbuff.c:118 [inline]\n skb_put.cold+0x24/0x24 net/core/skbuff.c:1990\n isotp_rcv_cf net/can/isotp.c:570 [inline]\n isotp_rcv+0xa38/0x1e30 net/can/isotp.c:668\n deliver net/can/af_can.c:574 [inline]\n can_rcv_filter+0x445/0x8d0 net/can/af_can.c:635\n can_receive+0x31d/0x580 net/can/af_can.c:665\n can_rcv+0x120/0x1c0 net/can/af_can.c:696\n __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5465\n __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5579\n\nTherefore we make sure the state changes and data structures stay\nconsistent at CAN frame reception time by adding a spin_lock in\nisotp_rcv(). This fixes the issue reported by syzkaller but does not\naffect real world operation."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: isotp: corrige una posible ejecuci\u00f3n de recepci\u00f3n de tramas CAN en isotp_rcv() Al recibir una trama CAN, la l\u00f3gica del c\u00f3digo actual no considera la recepci\u00f3n simult\u00e1nea de procesos que no aparecen en el uso en el mundo real. Ziyang Xuan escribe: El siguiente problema syz es uno de los escenarios. so-\u0026gt;rx.len es cambiado por isotp_rcv_ff() durante isotp_rcv_cf(), so-\u0026gt;rx.len es igual a 0 antes de alloc_skb() y es igual a 4096 despu\u00e9s de alloc_skb(). Eso activar\u00e1 skb_over_panic() en skb_put(). ==================================================== ===== CPU: 1 PID: 19 Comm: ksoftirqd/1 No contaminado 5.16.0-rc8-syzkaller #0 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:113 Seguimiento de llamadas:  skb_over_panic net/core/skbuff.c:118 [en l\u00ednea] skb_put.cold+0x24/0x24 net/core/skbuff.c:1990 isotp_rcv_cf net/can/isotp.c:570 [en l\u00ednea] isotp_rcv+0xa38/0x1e30 net/ can/isotp.c:668 entregar net/can/af_can.c:574 [en l\u00ednea] can_rcv_filter+0x445/0x8d0 net/can/af_can.c:635 can_receive+0x31d/0x580 net/can/af_can.c:665 can_rcv+ 0x120/0x1c0 net/can/af_can.c:696 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5465 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5579 Por lo tanto, nos aseguramos de que los cambios de estado y las estructuras de datos mantenga la coherencia en el momento de recepci\u00f3n de la trama CAN agregando un spin_lock en isotp_rcv(). Esto soluciona el problema informado por syzkaller pero no afecta el funcionamiento en el mundo real."
    }
  ],
  "id": "CVE-2022-48830",
  "lastModified": "2025-09-25T19:22:00.600",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-07-16T12:15:06.613",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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