Vulnerability-Lookup

FKIE_CVE-2026-43427

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-20 18:29

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1]. Fix it by using WRITE_ONCE and memory barriers.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea	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	2.6.26
linux	linux_kernel	2.6.26
linux	linux_kernel	2.6.26
linux	linux_kernel	2.6.26
linux	linux_kernel	2.6.26
linux	linux_kernel	2.6.26
linux	linux_kernel	2.6.26
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
linux	linux_kernel	7.0

JSON

To clipboard

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CVE-2026-43427 (GCVE-0-2026-43427)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24

Title

usb: class: cdc-wdm: fix reordering issue in read code path

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/638328ca9c17ae651…
https://git.kernel.org/stable/c/170e8daca24da6edb…
https://git.kernel.org/stable/c/c8fa96ed021923dae…
https://git.kernel.org/stable/c/4ee3062bf2c9a722a…
https://git.kernel.org/stable/c/276aef0fd2b92f41b…
https://git.kernel.org/stable/c/67ed312124bb1b618…
https://git.kernel.org/stable/c/e3c874b05901dc519…
https://git.kernel.org/stable/c/8df672bfe3ec2268c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 638328ca9c17ae6511ad62198c57bae32ffa3c91 (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 170e8daca24da6edb4be82ab01abf44e87af387b (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < c8fa96ed021923dae147bcd9f9205b8df7b82360 (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 4ee3062bf2c9a722afef429826e8607eaf3fc6a0 (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 276aef0fd2b92f41b920ac891c72cadeee957934 (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 67ed312124bb1b61858778ac0b985b48961c862a (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < e3c874b05901dc519054b5107d16620e6d2b5fea (git) Affected: afba937e540c902c989cd516fd97ea0c8499bb27 , < 8df672bfe3ec2268c2636584202755898e547173 (git)
Linux	Linux	Affected: 2.6.26 Unaffected: 0 , < 2.6.26 (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)

Show details on NVD website

JSON

To clipboard

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        },
        {
          "url": "https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934"
        },
        {
          "url": "https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea"
        },
        {
          "url": "https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173"
        }
      ],
      "title": "usb: class: cdc-wdm: fix reordering issue in read code path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43427",
    "datePublished": "2026-05-08T14:22:00.345Z",
    "dateReserved": "2026-05-01T14:12:56.009Z",
    "dateUpdated": "2026-05-11T22:24:22.781Z",
    "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-2026-43427

CVE-2026-43427 (GCVE-0-2026-43427)

Tags

Sightings

Nomenclature