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CVE-2025-38364 (GCVE-0-2025-38364)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:47 – Updated: 2026-07-14 12:41
VLAI
Title
maple_tree: fix MA_STATE_PREALLOC flag in mas_preallocate()
Summary
In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix MA_STATE_PREALLOC flag in mas_preallocate() Temporarily clear the preallocation flag when explicitly requesting allocations. Pre-existing allocations are already counted against the request through mas_node_count_gfp(), but the allocations will not happen if the MA_STATE_PREALLOC flag is set. This flag is meant to avoid re-allocating in bulk allocation mode, and to detect issues with preallocation calculations. The MA_STATE_PREALLOC flag should also always be set on zero allocations so that detection of underflow allocations will print a WARN_ON() during consumption. User visible effect of this flaw is a WARN_ON() followed by a null pointer dereference when subsequent requests for larger number of nodes is ignored, such as the vma merge retry in mmap_region() caused by drivers altering the vma flags (which happens in v6.6, at least)
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: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < d69cd64bd5af41c6fd409313504089970edaf02f (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < e63032e66bca1d06e600033f3369ba3db3af0870 (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < cf95f8426f889949b738f51ffcd72884411f3a6a (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < 9e32f4700867abbd5d19abfcf698dbd0d2ce36a4 (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < fba46a5d83ca8decb338722fb4899026d8d9ead2 (git)
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Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.146 , ≤ 6.1.* (semver)
Unaffected: 6.6.99 , ≤ 6.6.* (semver)
Unaffected: 6.12.36 , ≤ 6.12.* (semver)
Unaffected: 6.15.5 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:04:52+00:00",
      "cve": "CVE-2025-38364",
      "id": "CVE-2025-38364",
      "initial_release_date": "2025-07-25T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: maple_tree: fix MA_STATE_PREALLOC flag in mas_preallocate()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38364.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T16:49:06Z",
      "cve": "CVE-2025-38364",
      "id": "CVE-2025-38364",
      "initial_release_date": "2025-07-28T23:24:08Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "437",
      "product_status:known_not_affected": "399",
      "product_status:recommended": "472",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38364",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38364.json",
      "version": "46"
    }
  }
}



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Taxonomy of the tags.





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.