What is CVE-2023-53473?

CVE-2023-53473 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.2 onward and patched in 5.15.112, 6.1.29, 6.2.16 and others. CVE-2023-53473 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53473?

CVE-2023-53473 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-53473?

Yes, CVE-2023-53473 has been patched. Fixed versions include 5.15.112, 6.1.29, 6.2.16 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53473 actively exploited?

CVE-2023-53473 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53473

High

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.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-20

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.2 and later are affected. Fixed in 5.15.112, 6.1.29, 6.2.16, 6.3.3, 6.4 and their respective stable series.

Affected from

≥ 5.2

Fixed in

✓ 5.15.112 5.15.x ✓ 6.1.29 6.1.x ✓ 6.2.16 6.2.x ✓ 6.3.3 6.3.x ✓ 6.4

References

The following references provide additional information about CVE-2023-53473 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/4b3cb1d108bfc2aebb0d7c8a52261a53cf7f5786
Patch
Kernel patch commit
https://git.kernel.org/stable/c/70d579aefa652a06af97e013e3fbbabbe5a43553
Patch
Kernel patch commit
https://git.kernel.org/stable/c/b2531936118deb3f479c4fa1bcd787b74b8faa6a
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2023-53473

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-20

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53473?

CVE-2023-53473 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.2 onward and has been patched in 5.15.112, 6.1.29, 6.2.16 and others. CVE-2023-53473 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53473?

CVE-2023-53473 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-53473?

Yes — CVE-2023-53473 has been patched. Fixed versions include 5.15.112, 6.1.29, 6.2.16 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53473 actively exploited?

No — CVE-2023-53473 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.