CVE-2024-53176
A critical bug in the Linux kernel’s SMB/CIFS file system can cause the kernel to crash during unmount operations, leading to a denial of service. The issue occurs when cached directory entries are not properly released, triggering kernel BUG messages. The vulnerability has been fixed in recent kernel releases.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel users running SMB/CIFS mounts, especially those on kernel versions prior to the fix.
Real-world impact
An attacker could crash the kernel, forcing a reboot or rendering the system unusable, effectively taking the affected machine offline.
Why this severity
The CVSS score of 9.8 reflects that the flaw allows remote attackers to cause a kernel crash without authentication, resulting in a complete denial of service. The high impact on confidentiality, integrity, and availability makes it critical.
What to do about it
- 01Upgrade your Linux kernel to a version that includes the fix for CVE-2024-53176.
- 02Reboot the system to load the updated kernel.
NVD description indicates the vulnerability has been resolved in the Linux kernel.
Timeline
- Dec 27, 2024 · Dec 27, 2024PublishedDisclosed and added to the National Vulnerability Database.
- Aug 4, 2026 · 2d agoAdvisory updatedThe NVD record was last revised.
- Aug 4, 2026 · 1d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.