In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and… (CVE-2026-63793)
A use-after-free vulnerability in the Linux kernel's NTFS filesystem code was resolved by serializing access to the volume label with a mutex and snapshotting the label before copying it to user space. This prevents concurrent modification and reading of the volume label that could lead to memory corruption.
AI Analysis
Technical Summary
CVE-2026-63793 addresses a use-after-free vulnerability in the Linux kernel NTFS driver. The flaw occurs when FS_IOC_SETFSLABEL replaces the volume label (vol->volume_label) while FS_IOC_GETTSLABEL reads it concurrently, leading to unsafe concurrent access. The fix involves protecting vol->volume_label with a mutex and snapshotting the label before copy_to_user to ensure safe serialization of volume label accesses.
Potential Impact
Successful exploitation could lead to memory corruption resulting in confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). However, the attack vector requires local access with low privileges and no user interaction.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to serialize volume label accesses using a mutex and snapshotting the label before copying it to user space. Users should apply the official kernel updates from their Linux distribution vendors to remediate this vulnerability. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume label accesses Protect vol->volume_label with a mutex and… (CVE-2026-63793)
Description
A use-after-free vulnerability in the Linux kernel's NTFS filesystem code was resolved by serializing access to the volume label with a mutex and snapshotting the label before copying it to user space. This prevents concurrent modification and reading of the volume label that could lead to memory corruption.
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-63793 addresses a use-after-free vulnerability in the Linux kernel NTFS driver. The flaw occurs when FS_IOC_SETFSLABEL replaces the volume label (vol->volume_label) while FS_IOC_GETTSLABEL reads it concurrently, leading to unsafe concurrent access. The fix involves protecting vol->volume_label with a mutex and snapshotting the label before copy_to_user to ensure safe serialization of volume label accesses.
Potential Impact
Successful exploitation could lead to memory corruption resulting in confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:H/I:H/A:H). However, the attack vector requires local access with low privileges and no user interaction.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to serialize volume label accesses using a mutex and snapshotting the label before copying it to user space. Users should apply the official kernel updates from their Linux distribution vendors to remediate this vulnerability. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-j6f5-rrpr-78g3
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63793"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5d27ad2a4a8d59891318ea
Added to database: 07/19/2026, 19:38:21 UTC
Last enriched: 08/15/2026, 03:37:41 UTC
Last updated: 09/02/2026, 22:52:13 UTC
Views: 70
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