Vulnerability-Lookup

FKIE_CVE-2026-31720

Vulnerability from fkie_nvd - Published: 2026-05-01 15:16 - Updated: 2026-05-06 20:58

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: validate control request size f_audio_complete() copies req->length bytes into a 4-byte stack variable: u32 data = 0; memcpy(&data, req->buf, req->length); req->length is derived from the host-controlled USB request path, which can lead to a stack out-of-bounds write. Validate req->actual against the expected payload size for the supported control selectors and decode only the expected amount of data. This avoids copying a host-influenced length into a fixed-size stack object.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0d41772d98dcaf6c17e875b7d0ea0154ae1191ee	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/21b11e8581285c6f10ef43d05df349d445f24273	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/26304d124e7f0383f8fe1168b5801a0ac7e16b1c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/557d1d4e862eccd0b74cc377b66de3e1e8d49605	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e0e34d85cd46ceb37d16054e97a373a32770f6c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8e5eb1d6e6a3d7bbea9c92132d0cda5793176426	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be2d32f0c3fe333d14c0a9ca90328dacbc3e06b8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c6da4fed7537aec19880c24f6c3a95065adb1406	Patch

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	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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    }
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  "id": "CVE-2026-31720",
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CVE-2026-31720 (GCVE-0-2026-31720)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-02 06:14

Title

usb: gadget: f_uac1_legacy: validate control request size

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/557d1d4e862eccd0b…
	https://git.kernel.org/stable/c/21b11e8581285c6f1…
	https://git.kernel.org/stable/c/0d41772d98dcaf6c1…
	https://git.kernel.org/stable/c/c6da4fed7537aec19…
	https://git.kernel.org/stable/c/be2d32f0c3fe333d1…
	https://git.kernel.org/stable/c/8e5eb1d6e6a3d7bbe…
	https://git.kernel.org/stable/c/26304d124e7f0383f…
	https://git.kernel.org/stable/c/6e0e34d85cd46ceb3…

Impacted products

Vendor

Product

Version

Linux

Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < 557d1d4e862eccd0b74cc377b66de3e1e8d49605 (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < 21b11e8581285c6f10ef43d05df349d445f24273 (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < 0d41772d98dcaf6c17e875b7d0ea0154ae1191ee (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < c6da4fed7537aec19880c24f6c3a95065adb1406 (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < be2d32f0c3fe333d14c0a9ca90328dacbc3e06b8 (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < 8e5eb1d6e6a3d7bbea9c92132d0cda5793176426 (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < 26304d124e7f0383f8fe1168b5801a0ac7e16b1c (git)
Affected: c6994e6f067cf0fc4c6cca3d164018b1150916f8 , < 6e0e34d85cd46ceb37d16054e97a373a32770f6c (git)

Linux

Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_uac1_legacy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "version": "6.6.134",
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              "version": "6.12.81",
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              "version": "6.18.22",
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              "version": "6.19.12",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-02T06:14:21.352Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "usb: gadget: f_uac1_legacy: validate control request size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-05-01T14:14:22.832Z",
    "dateReserved": "2026-03-09T15:48:24.134Z",
    "dateUpdated": "2026-05-02T06:14:21.352Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-31720

CVE-2026-31720 (GCVE-0-2026-31720)

Tags

Sightings

Nomenclature