CVE-2026-52992
fs/adfs: validate nzones in adfs_validate_bblk()
Description
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.
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 14, 2026, 7:44 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Linux kernel.
- Apply patches for ADFS validation.
- Reject ADFS discs with zero zones.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-52992.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52992 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-52992
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-52992 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52992 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.6 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': '33aafd2418a59c96c0389d47ea09026661fa9ec6', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': '1f0ed0f57f0fc87e46fe19a05435c214dc464be2', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': '6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': 'a11372a8b1ceaa5e950a84b3b5fbf8228f25e277', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': '1586bd2d2fb436a26df20a70e78b000d34a7d159', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': 'a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': '60d82592ac8b5637fbed871381eb0a16df0a492e', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6f14a0d71b0773a1d4147d1a3c33d537cd213ab', 'lessThan': 'dd9d3e16c2d5fa166e13dce07413be51f42c8f5d', 'versionType': 'git'}], 'programFiles': ['fs/adfs/super.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/adfs/super.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/1586bd2d2fb436a26df20a70e78b000d34a7d159 Added Reference https://git.kernel.org/stable/c/1f0ed0f57f0fc87e46fe19a05435c214dc464be2 Added Reference https://git.kernel.org/stable/c/33aafd2418a59c96c0389d47ea09026661fa9ec6 Added Reference https://git.kernel.org/stable/c/60d82592ac8b5637fbed871381eb0a16df0a492e Added Reference https://git.kernel.org/stable/c/6ff8cca5cdb4f2e0ea6d28ecd78479dd3f221ebc Added Reference https://git.kernel.org/stable/c/a11372a8b1ceaa5e950a84b3b5fbf8228f25e277 Added Reference https://git.kernel.org/stable/c/a3fd5dc1c7b0aae947a67dc2e2c037d57557a4de Added Reference https://git.kernel.org/stable/c/dd9d3e16c2d5fa166e13dce07413be51f42c8f5d