CVE-2025-37938 (GCVE-0-2025-37938)

Vulnerability from cvelistv5 – Published: 2025-05-20 15:34 – Updated: 2026-05-11 21:18
VLAI
Title
tracing: Verify event formats that have "%*p.."
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Verify event formats that have "%*p.." The trace event verifier checks the formats of trace events to make sure that they do not point at memory that is not in the trace event itself or in data that will never be freed. If an event references data that was allocated when the event triggered and that same data is freed before the event is read, then the kernel can crash by reading freed memory. The verifier runs at boot up (or module load) and scans the print formats of the events and checks their arguments to make sure that dereferenced pointers are safe. If the format uses "%*p.." the verifier will ignore it, and that could be dangerous. Cover this case as well. Also add to the sample code a use case of "%*pbl".
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: 5013f454a352cce8e62162976026a9c472595e42 , < 6854c87ac823181c810f8c07489ba543260c0023 (git)
Affected: 5013f454a352cce8e62162976026a9c472595e42 , < 4d11fac941d83509be4e6a21038281d6d96da50c (git)
Affected: 5013f454a352cce8e62162976026a9c472595e42 , < 03127354027508d076073b020d3070990fd6a958 (git)
Affected: 5013f454a352cce8e62162976026a9c472595e42 , < 04b80d45ecfaf780981d6582899e3ab205e4aa08 (git)
Affected: 5013f454a352cce8e62162976026a9c472595e42 , < c7204fd1758c0caf1938e8a59809a1fdf28a8114 (git)
Affected: 5013f454a352cce8e62162976026a9c472595e42 , < ea8d7647f9ddf1f81e2027ed305299797299aa03 (git)
Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 6.1.136 , ≤ 6.1.* (semver)
Unaffected: 6.6.89 , ≤ 6.6.* (semver)
Unaffected: 6.12.26 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
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      "current_release_date": "2026-06-30T10:16:41+00:00",
      "cve": "CVE-2025-37938",
      "id": "CVE-2025-37938",
      "initial_release_date": "2025-05-20T00:00:00+00:00",
      "product_status:known_affected": "226",
      "product_status:known_not_affected": "48",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing: Verify event formats that have \"%*p..\"",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37938.json",
      "version": "3"
    }
  }
}



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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.
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  • 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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