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Vulnerability record · CVE-2023-53473 · published 1 October 2025

CVE-2023-53473: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ext4: improve error handling from ext4_dirhash() The ext4_dirhash() will *almost* never fail, especially when the hash tree feature was first introduced. However, with the addition of support of encrypted, casefolded file names, that function can most certainly fail today. So make sure the callers of ext4_dirhash() properly check for failures, and reflect the errors back up to their callers.

7.8 CVSS 3.1 High EPSS 0.16% · top 95.0%
7.8CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
4 Aug 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: improve error handling from ext4_dirhash() The ext4_dirhash() will *almost* never fail, especially when the hash tree feature was first introduced. However, with the addition of support of encrypted, casefolded file names, that function can most certainly fail today. So make sure the callers of ext4_dirhash() properly check for failures, and reflect the errors back up to their callers.

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/4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786 Patch
https://git.kernel.org/stable/c/70d579aefa652a06af97e013e3fbbabbe5a43553 Patch
https://git.kernel.org/stable/c/b2531936118deb3f479c4fa1bcd787b74b8faa6a Patch
https://git.kernel.org/stable/c/c1fae027da61fe8e7eb99f7244297e81bc0f1e43 Patch
https://git.kernel.org/stable/c/f68876aeef96ef8b708ab10b9cb47ce0a5adb424 Patch

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Source: NIST National Vulnerability Database (record CVE-2023-53473), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.