CVE-2026-43428 (GCVE-0-2026-43428)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-08 14:22
VLAI?
Title
USB: core: Limit the length of unkillable synchronous timeouts
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: core: Limit the length of unkillable synchronous timeouts The usb_control_msg(), usb_bulk_msg(), and usb_interrupt_msg() APIs in usbcore allow unlimited timeout durations. And since they use uninterruptible waits, this leaves open the possibility of hanging a task for an indefinitely long time, with no way to kill it short of unplugging the target device. To prevent this sort of problem, enforce a maximum limit on the length of these unkillable timeouts. The limit chosen here, somewhat arbitrarily, is 60 seconds. On many systems (although not all) this is short enough to avoid triggering the kernel's hung-task detector. In addition, clear up the ambiguity of negative timeout values by treating them the same as 0, i.e., using the maximum allowed timeout.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4e86f5b79e62ded7e3c3ebd688cf5775e618148a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 06d2bbc4c66c6b0e8a43728c4949026026a5be67 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6c62935670acdbb7687ced20494923b66fbb0367 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 659c0c7d50a4b0f6aa197c4c098cfd91daf63862 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 24b31a227f679a942d820840a4dea7f0c09a387f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 64f3d75633aedc12bdff220e9a4337177430bd9d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2d34cb4d1d6283b4be9c78f4a83ed6956d3069ec (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1015c27a5e1a63efae2b18a9901494474b4d1dc3 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/core/message.c",
            "include/linux/usb.h"
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            "include/linux/usb.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.19",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: core: Limit the length of unkillable synchronous timeouts\n\nThe usb_control_msg(), usb_bulk_msg(), and usb_interrupt_msg() APIs in\nusbcore allow unlimited timeout durations.  And since they use\nuninterruptible waits, this leaves open the possibility of hanging a\ntask for an indefinitely long time, with no way to kill it short of\nunplugging the target device.\n\nTo prevent this sort of problem, enforce a maximum limit on the length\nof these unkillable timeouts.  The limit chosen here, somewhat\narbitrarily, is 60 seconds.  On many systems (although not all) this\nis short enough to avoid triggering the kernel\u0027s hung-task detector.\n\nIn addition, clear up the ambiguity of negative timeout values by\ntreating them the same as 0, i.e., using the maximum allowed timeout."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T14:22:01.027Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/4e86f5b79e62ded7e3c3ebd688cf5775e618148a"
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        {
          "url": "https://git.kernel.org/stable/c/06d2bbc4c66c6b0e8a43728c4949026026a5be67"
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          "url": "https://git.kernel.org/stable/c/1015c27a5e1a63efae2b18a9901494474b4d1dc3"
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      "title": "USB: core: Limit the length of unkillable synchronous timeouts",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43428",
    "datePublished": "2026-05-08T14:22:01.027Z",
    "dateReserved": "2026-05-01T14:12:56.009Z",
    "dateUpdated": "2026-05-08T14:22:01.027Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43428",
      "date": "2026-05-09",
      "epss": "0.00024",
      "percentile": "0.07036"
    },
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  }
}


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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.

Sightings

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Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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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