CVE-2023-53861
Published Dec 9, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: correct grp validation in ext4_mb_good_group Group corruption check will access memory of grp and will trigger kernel crash if grp is NULL. So do NULL check before corruption check.
Is your site exposed to CVE-2023-53861?
Run a free security scan — no signup, results in seconds.
References
Other References
https://git.kernel.org/stable/c/245759d987b617d183061db6ab8886ebb5cc78e9
https://git.kernel.org/stable/c/3e24082f16825279054a2b8a5e668d65070bbf07
https://git.kernel.org/stable/c/772ca4bc1d0d21320ef2ecc0f9e4f90ea85a035d
https://git.kernel.org/stable/c/83a9d5f5ec7e75640b1ba0bbd77a4888df798bb4
https://git.kernel.org/stable/c/a9ce5993a0f5c0887c8a1b4ffa3b8046fbcfdc93
https://git.kernel.org/stable/c/e69d665987db0e37896adf78a7e718f9a0a75d3f
Frequently Asked Questions
What is CVE-2023-53861? +
In the Linux kernel, the following vulnerability has been resolved:
ext4: correct grp validation in ext4_mb_good_group
Group corruption check will access memory of grp and will trigger kernel
crash if grp is NULL. So do NULL check before corruption check.
How do I check if I'm vulnerable to CVE-2023-53861? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.