What is CVE-2023-53450?

CVE-2023-53450 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.25 onward and patched in 4.14.315, 4.19.283, 5.4.243 and others. CVE-2023-53450 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53450?

CVE-2023-53450 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53450?

Yes, CVE-2023-53450 has been patched. Fixed versions include 4.14.315, 4.19.283, 5.4.243 and others. If you are running Linux kernel 2.6.25 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53450 actively exploited?

CVE-2023-53450 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53450

Medium

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.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-617

CVE-2023-53450 is classified as CWE-617

See CWE-617 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 2.6.25 and later are affected. Fixed in 4.14.315, 4.19.283, 5.4.243, 5.10.180, 5.15.112, 6.1.29, 6.2.16, 6.3.3, 6.4 and their respective stable series.

Affected from

≥ 2.6.25

Fixed in

✓ 4.14.315 4.14.x ✓ 4.19.283 4.19.x ✓ 5.4.243 5.4.x ✓ 5.10.180 5.10.x ✓ 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-2023-53450 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/185062a21976fbc38f2efd296951b02c4500cf65
Patch
Kernel patch commit
https://git.kernel.org/stable/c/463808f237cf73e98a1a45ff7460c2406a150a0b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/53c14e7cc2257191ba15425c15638fc4f8abb92b
Patch

9 patch commits total View all on NVD

Details

CVE ID CVE-2023-53450

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53450?

CVE-2023-53450 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 2.6.25 onward and has been patched in 4.14.315, 4.19.283, 5.4.243 and others. CVE-2023-53450 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53450?

CVE-2023-53450 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53450?

Yes — CVE-2023-53450 has been patched. Fixed versions include 4.14.315, 4.19.283, 5.4.243 and others. If you are running Linux kernel 2.6.25 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53450 actively exploited?

No — CVE-2023-53450 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.