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. The issue involved concurrent access where FS_IOC_SETFSLABEL could replace the volume label while FS_IOC_GETTSLABEL read it, leading to a potential use-after-free. The fix introduced a mutex to protect the volume label and snapshot it before copying to user space.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's NTFS driver allowed a race condition between setting and getting the volume label via FS_IOC_SETFSLABEL and FS_IOC_GETTSLABEL ioctl calls. Without proper synchronization, concurrent access could cause a use-after-free on vol->volume_label. The issue was resolved by protecting vol->volume_label with a mutex and snapshotting the label before copy_to_user, preventing concurrent modification and use-after-free conditions.
Potential Impact
This vulnerability could lead to use-after-free conditions in kernel space, potentially causing system instability or crashes. The information does not specify any known exploits in the wild or direct privilege escalation or code execution impacts.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to serialize volume label accesses by protecting vol->volume_label with a mutex and snapshotting the label before copying to user space. Users should update to a kernel version that includes this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or Linux kernel advisory for the exact fixed versions and update accordingly.
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. The issue involved concurrent access where FS_IOC_SETFSLABEL could replace the volume label while FS_IOC_GETTSLABEL read it, leading to a potential use-after-free. The fix introduced a mutex to protect the volume label and snapshot it before copying to user space.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's NTFS driver allowed a race condition between setting and getting the volume label via FS_IOC_SETFSLABEL and FS_IOC_GETTSLABEL ioctl calls. Without proper synchronization, concurrent access could cause a use-after-free on vol->volume_label. The issue was resolved by protecting vol->volume_label with a mutex and snapshotting the label before copy_to_user, preventing concurrent modification and use-after-free conditions.
Potential Impact
This vulnerability could lead to use-after-free conditions in kernel space, potentially causing system instability or crashes. The information does not specify any known exploits in the wild or direct privilege escalation or code execution impacts.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to serialize volume label accesses by protecting vol->volume_label with a mutex and snapshotting the label before copying to user space. Users should update to a kernel version that includes this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or Linux kernel advisory for the exact fixed versions and update accordingly.
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
- null
Threat ID: 6a5d27ad2a4a8d59891318ea
Added to database: 07/19/2026, 19:38:21 UTC
Last enriched: 07/19/2026, 20:20:39 UTC
Last updated: 07/20/2026, 11:41:50 UTC
Views: 11
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