CVE-2025-37863 (GCVE-0-2025-37863)

Vulnerability from cvelistv5 – Published: 2025-05-09 06:43 – Updated: 2026-05-23 15:58
VLAI
Title
ovl: don't allow datadir only
Summary
In the Linux kernel, the following vulnerability has been resolved: ovl: don't allow datadir only In theory overlayfs could support upper layer directly referring to a data layer, but there's no current use case for this. Originally, when data-only layers were introduced, this wasn't allowed, only introduced by the "datadir+" feature, but without actually handling this case, resulting in an Oops. Fix by disallowing datadir without lowerdir.
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
Linux Linux Affected: cc0918b3582c98f12cfb30bf7496496d14bff3e9 , < 0874b629f65320778e7e3e206177770666d9db18 (git)
Affected: 24e16e385f2272b1a9df51337a5c32d28a29c7ad , < b9e3579213ba648fa23f780e8d53e99011c62331 (git)
Affected: 24e16e385f2272b1a9df51337a5c32d28a29c7ad , < 21d2ffb0e9838a175064c22f3a9de97d1f56f27d (git)
Affected: 24e16e385f2272b1a9df51337a5c32d28a29c7ad , < eb3a04a8516ee9b5174379306f94279fc90424c4 (git)
Affected: 6.6.23 , < 6.6.88 (semver)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.6.88 , ≤ 6.6.* (semver)
Unaffected: 6.12.25 , ≤ 6.12.* (semver)
Unaffected: 6.14.4 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T00:08:35+00:00",
      "cve": "CVE-2025-37863",
      "id": "CVE-2025-37863",
      "initial_release_date": "2025-05-09T00:00:00+00:00",
      "product_status:known_affected": "104",
      "product_status:known_not_affected": "170",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ovl: don\u0027t allow datadir only",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37863.json",
      "version": "3"
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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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