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CVE-2026-52992 (GCVE-0-2026-52992)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
Title
fs/adfs: validate nzones in adfs_validate_bblk()
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/adfs: validate nzones in adfs_validate_bblk() Reject ADFS disc records with a zero zone count during boot block validation, before the disc record is used. When nzones is 0, adfs_read_map() passes it to kmalloc_array(0, ...) which returns ZERO_SIZE_PTR, and adfs_map_layout() then writes to dm[-1], causing an out-of-bounds write before the allocated buffer. adfs_validate_dr0() already rejects nzones != 1 for old-format images. Add the equivalent check to adfs_validate_bblk() for new-format images so that a crafted image with nzones == 0 is rejected at probe time. Found by syzkaller.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < 33aafd2418a59c96c0389d47ea09026661fa9ec6 (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < 1f0ed0f57f0fc87e46fe19a05435c214dc464be2 (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < 6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < a11372a8b1ceaa5e950a84b3b5fbf8228f25e277 (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < 1586bd2d2fb436a26df20a70e78b000d34a7d159 (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < 60d82592ac8b5637fbed871381eb0a16df0a492e (git)
Affected: f6f14a0d71b0773a1d4147d1a3c33d537cd213ab , < dd9d3e16c2d5fa166e13dce07413be51f42c8f5d (git)
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Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
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      "status": "interim",
      "title": "SUSE CVE CVE-2026-52992",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52992.json",
      "version": "2"
    }
  }
}



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Tags
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.