CVE-2026-52992

Kernel memory corruption via zero-zone ADFS image

Published Jun 24, 2026 · Updated Jun 24, 2026

Out-of-bounds write in the Linux Kernel ADFS driver allows local users to corrupt kernel memory via a crafted disc image. The adfs_validate_bblk() path accepts nzones as zero, so adfs_read_map() obtains ZERO_SIZE_PTR and adfs_map_layout() writes to dm[-1]. Triggering requires probing a crafted new-format ADFS image; the grounded consequence is kernel memory corruption, with system crash reported as the denial-of-service outcome.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux Kernel ADFS driver allows local users to corrupt kernel memory via a crafted disc image. The adfs_validate_bblk() path accepts nzones as zero, so adfs_read_map() obtains ZERO_SIZE_PTR and adfs_map_layout() writes to dm[-1]. Triggering requires probing a crafted new-format ADFS image; the grounded consequence is kernel memory corruption, with system crash reported as the denial-of-service outcome.

The record

CVE
CVE-2026-52992
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-124, CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.6
  2. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <1586bd2d2fb436a26df20a70e78b000d34a7d159
  3. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <1f0ed0f57f0fc87e46fe19a05435c214dc464be2
  4. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <33aafd2418a59c96c0389d47ea09026661fa9ec6
  5. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <60d82592ac8b5637fbed871381eb0a16df0a492e
  6. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc
  7. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <a11372a8b1ceaa5e950a84b3b5fbf8228f25e277
  8. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de
  9. Affected versionversion=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <dd9d3e16c2d5fa166e13dce07413be51f42c8f5d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.6; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <1586bd2d2fb436a26df20a70e78b000d34a7d159; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <1f0ed0f57f0fc87e46fe19a05435c214dc464be2; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <33aafd2418a59c96c0389d47ea09026661fa9ec6; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <60d82592ac8b5637fbed871381eb0a16df0a492e; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <a11372a8b1ceaa5e950a84b3b5fbf8228f25e277; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de; version=f6f14a0d71b0773a1d4147d1a3c33d537cd213ab <dd9d3e16c2d5fa166e13dce07413be51f42c8f5d

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-124Buffer Underwrite ('Buffer Underflow')
CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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