CVE-2026-53049
A critical flaw in the Linux kernel’s GFS2 filesystem can let an attacker corrupt data or crash the system. The bug occurs when log‑flushing functions run without proper locking, creating a race condition that can be exploited.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel users that employ the GFS2 filesystem, typically system administrators managing Linux servers.
Real-world impact
An attacker could cause data corruption, loss, or denial of service by triggering the race condition in log flushing, potentially affecting critical services and data integrity.
Why this severity
The CVSS score of 9.8 reflects that the flaw is network‑exploitable with no authentication or user interaction, and it can lead to full compromise of confidentiality, integrity, and availability.
What to do about it
- 01Verify the current kernel version with `uname -r`.
- 02Install the latest kernel update from your distribution’s package manager (e.g., `apt update && apt install linux-image-<latest>` or `yum update kernel`).
- 03Reboot the system to load the new kernel.
NVD-referenced vendor advisory
Timeline
- Jun 24, 2026 · Jun 24, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 21, 2026 · 13d agoAdvisory updatedThe NVD record was last revised.
- Jul 21, 2026 · 13d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- git.kernel.org/stable/c/3b28eb75afe520972b…patch
- git.kernel.org/stable/c/49d9be0722da3a4a89…patch
- git.kernel.org/stable/c/98e8bf249c790d56de…patch
- git.kernel.org/stable/c/bf5fcd9c37c2546bea…patch
- git.kernel.org/stable/c/ca95342cb1b39062a0…patch
- git.kernel.org/stable/c/f2f225cf505ac01613…patch
- git.kernel.org/stable/c/fe2c8d051150b90b3c…patch