How severe is CVE-2023-5521?

CVE-2023-5521 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-5521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5521?

CVE-2023-5521 affects Kernelsu. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-5521 published?

CVE-2023-5521 was published on 2023-10-11 and last updated on 2026-06-17.

CVE-2023-5521

CVE-2023-5521 is a critical-severity vulnerability in Kernelsu with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Kernelsu
Published: 2023-10-11
Last modified: 2026-06-17

Description

Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9.

Frequently asked questions

What is CVE-2023-5521?: Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9.
How severe is CVE-2023-5521?: CVE-2023-5521 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-5521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5521?: CVE-2023-5521 affects Kernelsu. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-5521 published?: CVE-2023-5521 was published on 2023-10-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kernelsu:kernelsu:*:*:*:*:*:*:*:*

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