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CVE-2025-38668 (GCVE-0-2025-38668)

Vulnerability from cvelistv5 – Published: 2025-08-22 16:02 – Updated: 2026-05-11 21:32
VLAI
Title
regulator: core: fix NULL dereference on unbind due to stale coupling data
Summary
In the Linux kernel, the following vulnerability has been resolved: regulator: core: fix NULL dereference on unbind due to stale coupling data Failing to reset coupling_desc.n_coupled after freeing coupled_rdevs can lead to NULL pointer dereference when regulators are accessed post-unbind. This can happen during runtime PM or other regulator operations that rely on coupling metadata. For example, on ridesx4, unbinding the 'reg-dummy' platform device triggers a panic in regulator_lock_recursive() due to stale coupling state. Ensure n_coupled is set to 0 to prevent access to invalid pointers.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < 7574892e259bbb16262ebfb4b65a2054a5e03a49 (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < 6c49eac796681e250e34156bafb643930310bd4a (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < ca9bef9ba1a6be640c87bf802d2e9e696021576a (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < 800a2cfb2df7f96b3fb48910fc595e0215f6b019 (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < 233d3c54c9620e95193923859ea1d0b0f5d748ca (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < 5d4261dbb3335221fd9c6e69f909ba79ee6663a7 (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8 (git)
Affected: d8ca7d184b33af7913c244900df77c6cad6a5590 , < ca46946a482238b0cdea459fb82fc837fb36260e (git)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.148 , ≤ 6.1.* (semver)
Unaffected: 6.6.101 , ≤ 6.6.* (semver)
Unaffected: 6.12.41 , ≤ 6.12.* (semver)
Unaffected: 6.15.9 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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Aseg\u00farese de que n_coupled est\u00e9 establecido en 0 para evitar el acceso a punteros no 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Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:14:24+00:00",
      "cve": "CVE-2025-38668",
      "id": "CVE-2025-38668",
      "initial_release_date": "2025-08-22T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: regulator: core: fix NULL dereference on unbind due to stale coupling data",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38668.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-28T16:59:33Z",
      "cve": "CVE-2025-38668",
      "id": "CVE-2025-38668",
      "initial_release_date": "2025-08-22T23:28:10Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "606",
      "product_status:known_not_affected": "190",
      "product_status:recommended": "472",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38668",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38668.json",
      "version": "51"
    }
  }
}



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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

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.