CVE-2026-31754 (GCVE-0-2026-31754)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-01 14:14
VLAI?
Title
usb: cdns3: gadget: fix state inconsistency on gadget init failure
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix state inconsistency on gadget init failure When cdns3_gadget_start() fails, the DRD hardware is left in gadget mode while software state remains INACTIVE, creating hardware/software state inconsistency. When switching to host mode via sysfs: echo host > /sys/class/usb_role/13180000.usb-role-switch/role The role state is not set to CDNS_ROLE_STATE_ACTIVE due to the error, so cdns_role_stop() skips cleanup because state is still INACTIVE. This violates the DRD controller design specification (Figure22), which requires returning to idle state before switching roles. This leads to a synchronous external abort in xhci_gen_setup() when setting up the host controller: [ 516.440698] configfs-gadget 13180000.usb: failed to start g1: -19 [ 516.442035] cdns-usb3 13180000.usb: Failed to add gadget [ 516.443278] cdns-usb3 13180000.usb: set role 2 has failed ... [ 1301.375722] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller [ 1301.377716] Internal error: synchronous external abort: 96000010 [#1] PREEMPT SMP [ 1301.382485] pc : xhci_gen_setup+0xa4/0x408 [ 1301.393391] backtrace: ... xhci_gen_setup+0xa4/0x408 <-- CRASH xhci_plat_setup+0x44/0x58 usb_add_hcd+0x284/0x678 ... cdns_role_set+0x9c/0xbc <-- Role switch Fix by calling cdns_drd_gadget_off() in the error path to properly clean up the DRD gadget state.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < fb7110a052467098967284ef14d306810b354937 (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 9b1d301fbae837bf6979a19030b81d869bb15f7a (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < cfca84f5986afceb63a3adf39d4a98e915aebbc2 (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 5a85599ca4d2584d89dc69f4fc49303b75a42338 (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < c32f8748d70c8fc77676ad92ed76cede17bf2c48 (git)
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    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdns3-gadget.c"
          ],
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              "versionType": "git"
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          "vendor": "Linux",
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              "version": "6.19.12",
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            }
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: gadget: fix state inconsistency on gadget init failure\n\nWhen cdns3_gadget_start() fails, the DRD hardware is left in gadget mode\nwhile software state remains INACTIVE, creating hardware/software state\ninconsistency.\n\nWhen switching to host mode via sysfs:\n  echo host \u003e /sys/class/usb_role/13180000.usb-role-switch/role\n\nThe role state is not set to CDNS_ROLE_STATE_ACTIVE due to the error,\nso cdns_role_stop() skips cleanup because state is still INACTIVE.\nThis violates the DRD controller design specification (Figure22),\nwhich requires returning to idle state before switching roles.\n\nThis leads to a synchronous external abort in xhci_gen_setup() when\nsetting up the host controller:\n\n[  516.440698] configfs-gadget 13180000.usb: failed to start g1: -19\n[  516.442035] cdns-usb3 13180000.usb: Failed to add gadget\n[  516.443278] cdns-usb3 13180000.usb: set role 2 has failed\n...\n[ 1301.375722] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller\n[ 1301.377716] Internal error: synchronous external abort: 96000010 [#1] PREEMPT SMP\n[ 1301.382485] pc : xhci_gen_setup+0xa4/0x408\n[ 1301.393391] backtrace:\n    ...\n    xhci_gen_setup+0xa4/0x408    \u003c-- CRASH\n    xhci_plat_setup+0x44/0x58\n    usb_add_hcd+0x284/0x678\n    ...\n    cdns_role_set+0x9c/0xbc        \u003c-- Role switch\n\nFix by calling cdns_drd_gadget_off() in the error path to properly\nclean up the DRD gadget state."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-01T14:14:45.628Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/fb7110a052467098967284ef14d306810b354937"
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          "url": "https://git.kernel.org/stable/c/9b1d301fbae837bf6979a19030b81d869bb15f7a"
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          "url": "https://git.kernel.org/stable/c/cfca84f5986afceb63a3adf39d4a98e915aebbc2"
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          "url": "https://git.kernel.org/stable/c/5a85599ca4d2584d89dc69f4fc49303b75a42338"
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        },
        {
          "url": "https://git.kernel.org/stable/c/c32f8748d70c8fc77676ad92ed76cede17bf2c48"
        }
      ],
      "title": "usb: cdns3: gadget: fix state inconsistency on gadget init failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31754",
    "datePublished": "2026-05-01T14:14:45.628Z",
    "dateReserved": "2026-03-09T15:48:24.139Z",
    "dateUpdated": "2026-05-01T14:14:45.628Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31754",
      "date": "2026-05-05",
      "epss": "0.0003",
      "percentile": "0.08562"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31754\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-01T15:16:38.330\",\"lastModified\":\"2026-05-01T15:24:14.893\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: cdns3: gadget: fix state inconsistency on gadget init failure\\n\\nWhen cdns3_gadget_start() fails, the DRD hardware is left in gadget mode\\nwhile software state remains INACTIVE, creating hardware/software state\\ninconsistency.\\n\\nWhen switching to host mode via sysfs:\\n  echo host \u003e /sys/class/usb_role/13180000.usb-role-switch/role\\n\\nThe role state is not set to CDNS_ROLE_STATE_ACTIVE due to the error,\\nso cdns_role_stop() skips cleanup because state is still INACTIVE.\\nThis violates the DRD controller design specification (Figure22),\\nwhich requires returning to idle state before switching roles.\\n\\nThis leads to a synchronous external abort in xhci_gen_setup() when\\nsetting up the host controller:\\n\\n[  516.440698] configfs-gadget 13180000.usb: failed to start g1: -19\\n[  516.442035] cdns-usb3 13180000.usb: Failed to add gadget\\n[  516.443278] cdns-usb3 13180000.usb: set role 2 has failed\\n...\\n[ 1301.375722] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller\\n[ 1301.377716] Internal error: synchronous external abort: 96000010 [#1] PREEMPT SMP\\n[ 1301.382485] pc : xhci_gen_setup+0xa4/0x408\\n[ 1301.393391] backtrace:\\n    ...\\n    xhci_gen_setup+0xa4/0x408    \u003c-- CRASH\\n    xhci_plat_setup+0x44/0x58\\n    usb_add_hcd+0x284/0x678\\n    ...\\n    cdns_role_set+0x9c/0xbc        \u003c-- Role switch\\n\\nFix by calling cdns_drd_gadget_off() in the error path to properly\\nclean up the DRD gadget state.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5a85599ca4d2584d89dc69f4fc49303b75a42338\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b1d301fbae837bf6979a19030b81d869bb15f7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c32f8748d70c8fc77676ad92ed76cede17bf2c48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cfca84f5986afceb63a3adf39d4a98e915aebbc2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb7110a052467098967284ef14d306810b354937\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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