CVE-2026-63793
ntfs: serialize volume label accesses
Description
In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and snaphost the label before copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it concurrently.
INFO
Published Date :
July 19, 2026, 12:16 p.m.
Last Modified :
Aug. 17, 2026, 5:17 a.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 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the resolved version.
- Apply relevant patches to mitigate the race condition.
- Ensure proper mutex usage for shared resource access.
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-2026-63793.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/acd744019460bad22e43d4569a502f9c88d331ae | Patch |
| https://git.kernel.org/stable/c/e9e50ce4f13dc721014af622613409455c734942 | Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63793 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-2026-63793
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-2026-63793 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63793 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.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9c87959601e80b39a45250e362e6ddfec17cb0fa', 'lessThan': 'acd744019460bad22e43d4569a502f9c88d331ae', 'versionType': 'git'}, {'status': 'affected', 'version': '9c87959601e80b39a45250e362e6ddfec17cb0fa', 'lessThan': 'e9e50ce4f13dc721014af622613409455c734942', 'versionType': 'git'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.1'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.3', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9c87959601e80b39a45250e362e6ddfec17cb0fa', 'lessThan': 'acd744019460bad22e43d4569a502f9c88d331ae', 'versionType': 'git'}, {'status': 'affected', 'version': '9c87959601e80b39a45250e362e6ddfec17cb0fa', 'lessThan': 'e9e50ce4f13dc721014af622613409455c734942', 'versionType': 'git'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.1'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.3', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Jul. 30, 2026
Action Type Old Value New Value Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 7.1 up to (excluding) 7.1.3 Added Reference Type kernel.org: https://git.kernel.org/stable/c/acd744019460bad22e43d4569a502f9c88d331ae Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e9e50ce4f13dc721014af622613409455c734942 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 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 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'acd744019460bad22e43d4569a502f9c88d331ae', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'e9e50ce4f13dc721014af622613409455c734942', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '7.1.3', 'versionType': 'semver'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '7.1.3', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '9c87959601e80b39a45250e362e6ddfec17cb0fa', 'lessThan': 'acd744019460bad22e43d4569a502f9c88d331ae', 'versionType': 'git'}, {'status': 'affected', 'version': '9c87959601e80b39a45250e362e6ddfec17cb0fa', 'lessThan': 'e9e50ce4f13dc721014af622613409455c734942', 'versionType': 'git'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.1'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.3', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 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': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'acd744019460bad22e43d4569a502f9c88d331ae', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'e9e50ce4f13dc721014af622613409455c734942', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '7.1.3', 'versionType': 'semver'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '7.1.3', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs/file.c', 'fs/ntfs/super.c', 'fs/ntfs/volume.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and snaphost the label before copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it concurrently. Added Reference https://git.kernel.org/stable/c/acd744019460bad22e43d4569a502f9c88d331ae Added Reference https://git.kernel.org/stable/c/e9e50ce4f13dc721014af622613409455c734942