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CVE-2022-49692

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

net: phy: at803x: fix NULL pointer dereference on AR9331 PHY

Latest kernel will explode on the PHY interrupt config, since it depends now on allocated priv. So, run probe to allocate priv to fix it.

Same Issue would affect some other PHYs (QCA8081, QCA9561), so fix it too.

Detalles técnicos trazas, registros y código del informe original
 ar9331_switch ethernet.1:10 lan0 (uninitialized): PHY [!ahb!ethernet@1a000000!mdio!switch@10:00] driver [Qualcomm Atheros AR9331 built-in PHY] (irq=13)
 CPU 0 Unable to handle kernel paging request at virtual address 0000000a, epc == 8050e8a8, ra == 80504b34
         ...
 Call Trace:
 [<8050e8a8>] at803x_config_intr+0x5c/0xd0
 [<80504b34>] phy_request_interrupt+0xa8/0xd0
 [<8050289c>] phylink_bringup_phy+0x2d8/0x3ac
 [<80502b68>] phylink_fwnode_phy_connect+0x118/0x130
 [<8074d8ec>] dsa_slave_create+0x270/0x420
 [<80743b04>] dsa_port_setup+0x12c/0x148
 [<8074580c>] dsa_register_switch+0xaf0/0xcc0
 [<80511344>] ar9331_sw_probe+0x370/0x388
 [<8050cb78>] mdio_probe+0x44/0x70
 [<804df300>] really_probe+0x200/0x424
 [<804df7b4>] __driver_probe_device+0x290/0x298
 [<804df810>] driver_probe_device+0x54/0xe4
 [<804dfd50>] __device_attach_driver+0xe4/0x130
 [<804dcb00>] bus_for_each_drv+0xb4/0xd8
 [<804dfac4>] __device_attach+0x104/0x1a4
 [<804ddd24>] bus_probe_device+0x48/0xc4
 [<804deb44>] deferred_probe_work_func+0xf0/0x10c
 [<800a0ffc>] process_one_work+0x314/0x4d4
 [<800a17fc>] worker_thread+0x2a4/0x354
 [<800a9a54>] kthread+0x134/0x13c
 [<8006306c>] ret_from_kernel_thread+0x14/0x1c

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2022-49692",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49692",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-10-01T19:32:45.832458Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3265f421887847db9ae2c01a00645e33608556d8",
              "lessThan": "66fa352215e8455ba2e5f33793535795bd3e36ca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3265f421887847db9ae2c01a00645e33608556d8",
              "lessThan": "9926de7315be3d606cc011a305ad9adb9e8e14c9",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/phy/at803x.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.18.8",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/phy/at803x.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-02-26T07:01:43.990",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/66fa352215e8455ba2e5f33793535795bd3e36ca",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9926de7315be3d606cc011a305ad9adb9e8e14c9",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phy: at803x: fix NULL pointer dereference on AR9331 PHY\n\nLatest kernel will explode on the PHY interrupt config, since it depends\nnow on allocated priv. So, run probe to allocate priv to fix it.\n\n ar9331_switch ethernet.1:10 lan0 (uninitialized): PHY [!ahb!ethernet@1a000000!mdio!switch@10:00] driver [Qualcomm Atheros AR9331 built-in PHY] (irq=13)\n CPU 0 Unable to handle kernel paging request at virtual address 0000000a, epc == 8050e8a8, ra == 80504b34\n         ...\n Call Trace:\n [<8050e8a8>] at803x_config_intr+0x5c/0xd0\n [<80504b34>] phy_request_interrupt+0xa8/0xd0\n [<8050289c>] phylink_bringup_phy+0x2d8/0x3ac\n [<80502b68>] phylink_fwnode_phy_connect+0x118/0x130\n [<8074d8ec>] dsa_slave_create+0x270/0x420\n [<80743b04>] dsa_port_setup+0x12c/0x148\n [<8074580c>] dsa_register_switch+0xaf0/0xcc0\n [<80511344>] ar9331_sw_probe+0x370/0x388\n [<8050cb78>] mdio_probe+0x44/0x70\n [<804df300>] really_probe+0x200/0x424\n [<804df7b4>] __driver_probe_device+0x290/0x298\n [<804df810>] driver_probe_device+0x54/0xe4\n [<804dfd50>] __device_attach_driver+0xe4/0x130\n [<804dcb00>] bus_for_each_drv+0xb4/0xd8\n [<804dfac4>] __device_attach+0x104/0x1a4\n [<804ddd24>] bus_probe_device+0x48/0xc4\n [<804deb44>] deferred_probe_work_func+0xf0/0x10c\n [<800a0ffc>] process_one_work+0x314/0x4d4\n [<800a17fc>] worker_thread+0x2a4/0x354\n [<800a9a54>] kthread+0x134/0x13c\n [<8006306c>] ret_from_kernel_thread+0x14/0x1c\n\nSame Issue would affect some other PHYs (QCA8081, QCA9561), so fix it\ntoo."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: phy: at803x: se corrige la desreferencia de puntero NULL en AR9331 PHY. El kernel más reciente explotará en la configuración de interrupción de PHY, ya que ahora depende de privilegios asignados. Por lo tanto, ejecute la sonda para asignar privilegios para solucionarlo.  ar9331_switch ethernet.1:10 lan0 (uninitialized): PHY [!ahb!ethernet@1a000000!mdio!switch@10:00] driver [Qualcomm Atheros AR9331 built-in PHY] (irq=13) CPU 0 Unable to handle kernel paging request at virtual address 0000000a, epc == 8050e8a8, ra == 80504b34 ... Call Trace: [&lt;8050e8a8&gt;] at803x_config_intr+0x5c/0xd0 [&lt;80504b34&gt;] phy_request_interrupt+0xa8/0xd0 [&lt;8050289c&gt;] phylink_bringup_phy+0x2d8/0x3ac [&lt;80502b68&gt;] phylink_fwnode_phy_connect+0x118/0x130 [&lt;8074d8ec&gt;] dsa_slave_create+0x270/0x420 [&lt;80743b04&gt;] dsa_port_setup+0x12c/0x148 [&lt;8074580c&gt;] dsa_register_switch+0xaf0/0xcc0 [&lt;80511344&gt;] ar9331_sw_probe+0x370/0x388 [&lt;8050cb78&gt;] mdio_probe+0x44/0x70 [&lt;804df300&gt;] really_probe+0x200/0x424 [&lt;804df7b4&gt;] __driver_probe_device+0x290/0x298 [&lt;804df810&gt;] driver_probe_device+0x54/0xe4 [&lt;804dfd50&gt;] __device_attach_driver+0xe4/0x130 [&lt;804dcb00&gt;] bus_for_each_drv+0xb4/0xd8 [&lt;804dfac4&gt;] __device_attach+0x104/0x1a4 [&lt;804ddd24&gt;] bus_probe_device+0x48/0xc4 [&lt;804deb44&gt;] deferred_probe_work_func+0xf0/0x10c [&lt;800a0ffc&gt;] process_one_work+0x314/0x4d4 [&lt;800a17fc&gt;] worker_thread+0x2a4/0x354 [&lt;800a9a54&gt;] kthread+0x134/0x13c [&lt;8006306c&gt;] ret_from_kernel_thread+0x14/0x1c  El mismo problema afectaría a algunos otros PHY (QCA8081, QCA9561), así que corríjalo también."
    }
  ],
  "lastModified": "2026-06-17T05:18:52.500",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "38D180E5-530F-4351-9BC3-DF4D61BC7610",
              "versionEndExcluding": "5.18.8",
              "versionStartIncluding": "5.18"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "BF8547FC-C849-4F1B-804B-A93AE2F04A92"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F3068028-F453-4A1C-B80F-3F5609ACEF60"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}