CVE-2022-49692 (GCVE-0-2022-49692)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2026-05-11 19:04
VLAI
Title
net: phy: at803x: fix NULL pointer dereference on AR9331 PHY
Summary
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. 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 Same Issue would affect some other PHYs (QCA8081, QCA9561), so fix it too.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3265f421887847db9ae2c01a00645e33608556d8 , < 66fa352215e8455ba2e5f33793535795bd3e36ca (git)
Affected: 3265f421887847db9ae2c01a00645e33608556d8 , < 9926de7315be3d606cc011a305ad9adb9e8e14c9 (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 5.18.8 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "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 [\u003c8050e8a8\u003e] at803x_config_intr+0x5c/0xd0\n [\u003c80504b34\u003e] phy_request_interrupt+0xa8/0xd0\n [\u003c8050289c\u003e] phylink_bringup_phy+0x2d8/0x3ac\n [\u003c80502b68\u003e] phylink_fwnode_phy_connect+0x118/0x130\n [\u003c8074d8ec\u003e] dsa_slave_create+0x270/0x420\n [\u003c80743b04\u003e] dsa_port_setup+0x12c/0x148\n [\u003c8074580c\u003e] dsa_register_switch+0xaf0/0xcc0\n [\u003c80511344\u003e] ar9331_sw_probe+0x370/0x388\n [\u003c8050cb78\u003e] mdio_probe+0x44/0x70\n [\u003c804df300\u003e] really_probe+0x200/0x424\n [\u003c804df7b4\u003e] __driver_probe_device+0x290/0x298\n [\u003c804df810\u003e] driver_probe_device+0x54/0xe4\n [\u003c804dfd50\u003e] __device_attach_driver+0xe4/0x130\n [\u003c804dcb00\u003e] bus_for_each_drv+0xb4/0xd8\n [\u003c804dfac4\u003e] __device_attach+0x104/0x1a4\n [\u003c804ddd24\u003e] bus_probe_device+0x48/0xc4\n [\u003c804deb44\u003e] deferred_probe_work_func+0xf0/0x10c\n [\u003c800a0ffc\u003e] process_one_work+0x314/0x4d4\n [\u003c800a17fc\u003e] worker_thread+0x2a4/0x354\n [\u003c800a9a54\u003e] kthread+0x134/0x13c\n [\u003c8006306c\u003e] ret_from_kernel_thread+0x14/0x1c\n\nSame Issue would affect some other PHYs (QCA8081, QCA9561), so fix it\ntoo."
        }
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49692\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:43.990\",\"lastModified\":\"2026-06-17T05:18:52.500\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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 [\u003c8050e8a8\u003e] at803x_config_intr+0x5c/0xd0\\n [\u003c80504b34\u003e] phy_request_interrupt+0xa8/0xd0\\n [\u003c8050289c\u003e] phylink_bringup_phy+0x2d8/0x3ac\\n [\u003c80502b68\u003e] phylink_fwnode_phy_connect+0x118/0x130\\n [\u003c8074d8ec\u003e] dsa_slave_create+0x270/0x420\\n [\u003c80743b04\u003e] dsa_port_setup+0x12c/0x148\\n [\u003c8074580c\u003e] dsa_register_switch+0xaf0/0xcc0\\n [\u003c80511344\u003e] ar9331_sw_probe+0x370/0x388\\n [\u003c8050cb78\u003e] mdio_probe+0x44/0x70\\n [\u003c804df300\u003e] really_probe+0x200/0x424\\n [\u003c804df7b4\u003e] __driver_probe_device+0x290/0x298\\n [\u003c804df810\u003e] driver_probe_device+0x54/0xe4\\n [\u003c804dfd50\u003e] __device_attach_driver+0xe4/0x130\\n [\u003c804dcb00\u003e] bus_for_each_drv+0xb4/0xd8\\n [\u003c804dfac4\u003e] __device_attach+0x104/0x1a4\\n [\u003c804ddd24\u003e] bus_probe_device+0x48/0xc4\\n [\u003c804deb44\u003e] deferred_probe_work_func+0xf0/0x10c\\n [\u003c800a0ffc\u003e] process_one_work+0x314/0x4d4\\n [\u003c800a17fc\u003e] worker_thread+0x2a4/0x354\\n [\u003c800a9a54\u003e] kthread+0x134/0x13c\\n [\u003c8006306c\u003e] 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 m\u00e1s reciente explotar\u00e1 en la configuraci\u00f3n de interrupci\u00f3n 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: [\u0026lt;8050e8a8\u0026gt;] at803x_config_intr+0x5c/0xd0 [\u0026lt;80504b34\u0026gt;] phy_request_interrupt+0xa8/0xd0 [\u0026lt;8050289c\u0026gt;] phylink_bringup_phy+0x2d8/0x3ac [\u0026lt;80502b68\u0026gt;] phylink_fwnode_phy_connect+0x118/0x130 [\u0026lt;8074d8ec\u0026gt;] dsa_slave_create+0x270/0x420 [\u0026lt;80743b04\u0026gt;] dsa_port_setup+0x12c/0x148 [\u0026lt;8074580c\u0026gt;] dsa_register_switch+0xaf0/0xcc0 [\u0026lt;80511344\u0026gt;] ar9331_sw_probe+0x370/0x388 [\u0026lt;8050cb78\u0026gt;] mdio_probe+0x44/0x70 [\u0026lt;804df300\u0026gt;] really_probe+0x200/0x424 [\u0026lt;804df7b4\u0026gt;] __driver_probe_device+0x290/0x298 [\u0026lt;804df810\u0026gt;] driver_probe_device+0x54/0xe4 [\u0026lt;804dfd50\u0026gt;] __device_attach_driver+0xe4/0x130 [\u0026lt;804dcb00\u0026gt;] bus_for_each_drv+0xb4/0xd8 [\u0026lt;804dfac4\u0026gt;] __device_attach+0x104/0x1a4 [\u0026lt;804ddd24\u0026gt;] bus_probe_device+0x48/0xc4 [\u0026lt;804deb44\u0026gt;] deferred_probe_work_func+0xf0/0x10c [\u0026lt;800a0ffc\u0026gt;] process_one_work+0x314/0x4d4 [\u0026lt;800a17fc\u0026gt;] worker_thread+0x2a4/0x354 [\u0026lt;800a9a54\u0026gt;] kthread+0x134/0x13c [\u0026lt;8006306c\u0026gt;] ret_from_kernel_thread+0x14/0x1c  El mismo problema afectar\u00eda a algunos otros PHY (QCA8081, QCA9561), as\u00ed que corr\u00edjalo tambi\u00e9n.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/phy/at803x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3265f421887847db9ae2c01a00645e33608556d8\",\"lessThan\":\"66fa352215e8455ba2e5f33793535795bd3e36ca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3265f421887847db9ae2c01a00645e33608556d8\",\"lessThan\":\"9926de7315be3d606cc011a305ad9adb9e8e14c9\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/phy/at803x.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.8\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-10-01T19:32:45.832458Z\",\"id\":\"CVE-2022-49692\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18\",\"versionEndExcluding\":\"5.18.8\",\"matchCriteriaId\":\"38D180E5-530F-4351-9BC3-DF4D61BC7610\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"A8C30C2D-F82D-4D37-AB48-D76ABFBD5377\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"BF8547FC-C849-4F1B-804B-A93AE2F04A92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F3068028-F453-4A1C-B80F-3F5609ACEF60\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/66fa352215e8455ba2e5f33793535795bd3e36ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9926de7315be3d606cc011a305ad9adb9e8e14c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:15:28+00:00",
      "cve": "CVE-2022-49692",
      "id": "CVE-2022-49692",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "28",
      "product_status:known_not_affected": "246",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: phy: at803x: fix NULL pointer dereference on AR9331 PHY",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49692.json",
      "version": "3"
    }
  }
}



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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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