How severe is CVE-2023-53269?

CVE-2023-53269 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-53269 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53269?

CVE-2023-53269 primarily affects Linux Linux Kernel. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-53269?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-53269 have an EU (EUVD) identifier?

Yes. CVE-2023-53269 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59920.

When was CVE-2023-53269 published?

CVE-2023-53269 was published on 2025-09-16 and last updated on 2026-06-17.

CVE-2023-53269

CVE-2023-53269 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-59920
Affected product: Linux Linux Kernel
Published: 2025-09-16
Last modified: 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: block: ublk: make sure that block size is set correctly block size is one very key setting for block layer, and bad block size could panic kernel easily. Make sure that block size is set correctly. Meantime if ublk_validate_params() fails, clear ub->params so that disk is prevented from being added.

Frequently asked questions

What is CVE-2023-53269?: In the Linux kernel, the following vulnerability has been resolved: block: ublk: make sure that block size is set correctly block size is one very key setting for block layer, and bad block size could panic kernel easily. Make sure that block size is set correctly. Meantime if ublk_validate_params() fails, clear ub->params so that disk is prevented from being added.
How severe is CVE-2023-53269?: CVE-2023-53269 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-53269 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53269?: CVE-2023-53269 primarily affects Linux Linux Kernel. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-53269?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-53269 have an EU (EUVD) identifier?: Yes. CVE-2023-53269 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59920.
When was CVE-2023-53269 published?: CVE-2023-53269 was published on 2025-09-16 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*

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