Vulnerability-Lookup

FKIE_CVE-2026-43340

Vulnerability from fkie_nvd - Published: 2026-05-08 14:16 - Updated: 2026-05-15 19:46

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: comedi: Reinit dev->spinlock between attachments to low-level drivers `struct comedi_device` is the main controlling structure for a COMEDI device created by the COMEDI subsystem. It contains a member `spinlock` containing a spin-lock that is initialized by the COMEDI subsystem, but is reserved for use by a low-level driver attached to the COMEDI device (at least since commit 25436dc9d84f ("Staging: comedi: remove RT code")). Some COMEDI devices (those created on initialization of the COMEDI subsystem when the "comedi.comedi_num_legacy_minors" parameter is non-zero) can be attached to different low-level drivers over their lifetime using the `COMEDI_DEVCONFIG` ioctl command. This can result in inconsistent lock states being reported when there is a mismatch in the spin-lock locking levels used by each low-level driver to which the COMEDI device has been attached. Fix it by reinitializing `dev->spinlock` before calling the low-level driver's `attach` function pointer if `CONFIG_LOCKDEP` is enabled.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f8e9158bbb5b149e06287560	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3181c34b415c5464be9d34bff3e43ef63b747039	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/430291d8f3884f57ae0057049b0ca291453e29e1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4d5ffe524903a30e2e0da7d16841a56bec2de55c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c01bcc67a9a692d65508ebd480405b5e77d562b7	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
linux	linux_kernel	7.0

JSON

To clipboard

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    }
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}

CVE-2026-43340 (GCVE-0-2026-43340)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:37 – Updated: 2026-05-11 22:22

Title

comedi: Reinit dev->spinlock between attachments to low-level drivers

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/3181c34b415c5464b…
https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f…
https://git.kernel.org/stable/c/4d5ffe524903a30e2…
https://git.kernel.org/stable/c/c01bcc67a9a692d65…
https://git.kernel.org/stable/c/430291d8f3884f57a…
https://git.kernel.org/stable/c/b89c026227712c367…
https://git.kernel.org/stable/c/83134a7a176ce5b4b…
https://git.kernel.org/stable/c/4b9a9a6d71e3e2520…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 3181c34b415c5464be9d34bff3e43ef63b747039 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 2b1f49e4fdff3ef0f8e9158bbb5b149e06287560 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 4d5ffe524903a30e2e0da7d16841a56bec2de55c (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < c01bcc67a9a692d65508ebd480405b5e77d562b7 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 430291d8f3884f57ae0057049b0ca291453e29e1 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < b89c026227712c367950bbae055a5b31073d3b30 (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 83134a7a176ce5b4b19b6edecf4360e8d98d1a5a (git) Affected: ed9eccbe8970f6eedc1b978c157caf1251a896d4 , < 4b9a9a6d71e3e252032f959fb3895a33acb5865c (git)
Linux	Linux	Affected: 2.6.29 Unaffected: 0 , < 2.6.29 (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

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/comedi/drivers.c"
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:22:40.639Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30"
        },
        {
          "url": "https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865c"
        }
      ],
      "title": "comedi: Reinit dev-\u003espinlock between attachments to low-level drivers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43340",
    "datePublished": "2026-05-08T13:37:18.580Z",
    "dateReserved": "2026-05-01T14:12:56.003Z",
    "dateUpdated": "2026-05-11T22:22:40.639Z",
    "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-2026-43340

CVE-2026-43340 (GCVE-0-2026-43340)

Tags

Sightings

Nomenclature