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Vulnerability record · CVE-2023-53569 · published 4 October 2025

CVE-2023-53569: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored in the superblock has sensible value. Otherwise the shift computing the block size can overflow leading to undefined behavior.

7.8 CVSS 3.1 High EPSS 0.15% · top 96.2%
7.8CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ext2: Check block size validity during mount Check that log of block size stored in the superblock has sensible value. Otherwise the shift computing the block size can overflow leading to undefined behavior.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0ebfaf14150f55550cffb1148ed3920143c7a69c Patch
https://git.kernel.org/stable/c/22ab5fed07ad4b206ea910fd0132d1a0d4831584 Patch
https://git.kernel.org/stable/c/451b98155be5dfee05bc6e7c8b30c0be4add3f71 Patch
https://git.kernel.org/stable/c/62aeb94433fcec80241754b70d0d1836d5926b0a Patch
https://git.kernel.org/stable/c/99f8a15af6c9f0653193104a9e70891f950c6001 Patch
https://git.kernel.org/stable/c/c2e7776843a953fd7e48895c3880c277f996193e Patch
https://git.kernel.org/stable/c/c4813f858e5c3e4c4659ce95385c1c400c593e1e Patch
https://git.kernel.org/stable/c/e6f4fb28890c1361e0db9eb1adee3fc04e7fe7f5 Patch

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Source: NIST National Vulnerability Database (record CVE-2023-53569), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.