CVE-2023-53450: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: remove a BUG_ON in ext4_mb_release_group_pa() If a malicious fuzzer overwrites the ext4 superblock while it is mounted such that the s_first_data_block is set to a very large number, the calculation of the block group can underflow, and trigger a BUG_ON check. Change this to be an ext4_warning so that we don't crash the kernel.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-617 CWE-617

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.25 — 4.14.315
linux	linux_kernel	4.15 — 4.19.283
linux	linux_kernel	4.20 — 5.4.243
linux	linux_kernel	5.5 — 5.10.180
linux	linux_kernel	5.11 — 5.15.112
linux	linux_kernel	5.16 — 6.1.29
linux	linux_kernel	6.2 — 6.2.16
linux	linux_kernel	6.3 — 6.3.3
linux	linux_kernel	All

References

Advisories & Patches

Frequently Asked Questions

What is CVE-2023-53450? +

In the Linux kernel, the following vulnerability has been resolved: ext4: remove a BUG_ON in ext4_mb_release_group_pa() If a malicious fuzzer overwrites the ext4 superblock while it is mounted such that the s_first_data_block is set to a very large number, the calculation of the block group can underflow, and trigger a BUG_ON check. Change this to be an ext4_warning so that we don't crash the kernel. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53450? +

CVE-2023-53450 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53450? +

CVE-2023-53450 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53450? +

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.

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