Is CVE-2023-53450 in the CISA KEV catalog?

No. CVE-2023-53450 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-53450?

CVE-2023-53450 has a CVSS v3 base score of 5.5 (MEDIUM).

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

CVE-2023-53450 has an EPSS score of 0.15% (5th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-53450?

Upgrade linux on debian 11 to 5.10.191-1 or later.

CVE & CISA-KEV Catalog

CVE-2023-53450

MEDIUM

5.5

CVSS v3

NVD

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.

CWE-617

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.191-1CVE-2023-53450

Fixed in:6.1.37-1CVE-2023-53450

Fixed in:6.3.7-1CVE-2023-53450

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.15%probability of exploitation in 30 days

5thpercentile

Low risk: more likely to be exploited than 5% of all known CVEs.

References

Patch9

Related Vulnerabilities

Other CWE-617 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-8617	High	7.5	93%	-	Fix
CVE-2020-36222	High	7.5	78%	-	Fix
CVE-2006-5779	High	7.5	75%	-	Fix
CVE-2021-27212	High	7.5	64%	-	Fix
CVE-2018-5740	High	7.5	59%	-	Fix
CVE-2023-28425	Medium	5.5	55%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-23.