fkie_cve-2022-49326
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-03-13 21:50
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: rtl818x: Prevent using not initialized queues Using not existing queues can panic the kernel with rtl8180/rtl8185 cards. Ignore the skb priority for those cards, they only have one tx queue. Pierre Asselin (pa@panix.com) reported the kernel crash in the Gentoo forum: https://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html He also confirmed that this patch fixes the issue. In summary this happened: After updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a "divide error: 0000" when connecting to an AP. Control port tx now tries to use IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in 2.10. Since only the rtl8187se part of the driver supports QoS, the priority of the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185 cards. rtl8180 is then unconditionally reading out the priority and finally crashes on drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this patch: idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries "ring->entries" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got initialized.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ffPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtl818x: Prevent using not initialized queues\n\nUsing not existing queues can panic the kernel with rtl8180/rtl8185 cards.\nIgnore the skb priority for those cards, they only have one tx queue. Pierre\nAsselin (pa@panix.com) reported the kernel crash in the Gentoo forum:\n\nhttps://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html\n\nHe also confirmed that this patch fixes the issue. In summary this happened:\n\nAfter updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a\n\"divide error: 0000\" when connecting to an AP. Control port tx now tries to\nuse IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in\n2.10.\n\nSince only the rtl8187se part of the driver supports QoS, the priority\nof the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185\ncards.\n\nrtl8180 is then unconditionally reading out the priority and finally crashes on\ndrivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this\npatch:\n\tidx = (ring-\u003eidx + skb_queue_len(\u0026ring-\u003equeue)) % ring-\u003eentries\n\n\"ring-\u003eentries\" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got\ninitialized."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rtl818x: Evitar el uso de colas no inicializadas El uso de colas no existentes puede provocar un p\u00e1nico en el kernel con tarjetas rtl8180/rtl8185. Ignore la prioridad skb para esas tarjetas, solo tienen una cola tx. Pierre Asselin (pa@panix.com) inform\u00f3 sobre el fallo del kernel en el foro de Gentoo: https://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html Tambi\u00e9n confirm\u00f3 que este parche soluciona el problema. En resumen, esto sucedi\u00f3: Despu\u00e9s de actualizar wpa_supplicant de 2.9 a 2.10, el kernel se bloque\u00f3 con un \"error de divisi\u00f3n: 0000\" al conectarse a un AP. El puerto de control tx ahora intenta usar IEEE80211_AC_VO para la prioridad, que wpa_supplicants comienza a usar en 2.10. Como solo la parte rtl8187se del controlador admite QoS, la prioridad del skb se establece en IEEE80211_AC_BE (2) por mac80211 para las tarjetas rtl8180/rtl8185. Luego, rtl8180 lee incondicionalmente la prioridad y finalmente se bloquea en la l\u00ednea 544 de drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c sin este parche: idx = (ring-\u0026gt;idx + skb_queue_len(\u0026amp;ring-\u0026gt;queue)) % ring-\u0026gt;entries \"ring-\u0026gt;entries\" es cero para las tarjetas rtl8180/rtl8185, tx_ring[2] nunca se inicializ\u00f3."
    }
  ],
  "id": "CVE-2022-49326",
  "lastModified": "2025-03-13T21:50:26.567",
  "metrics": {
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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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2025-02-26T07:01:09.417",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-908"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
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}


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