How severe is CVE-2023-21227?

CVE-2023-21227 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-21227 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21227?

CVE-2023-21227 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-21227?

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

When was CVE-2023-21227 published?

CVE-2023-21227 was published on 2023-12-04 and last updated on 2026-06-17.

CVE-2023-21227

CVE-2023-21227 is a high-severity vulnerability in Google Android with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Google Android
Published: 2023-12-04
Last modified: 2026-06-17

Description

In HTBLogKM of htbserver.c, there is a possible information disclosure due to log information disclosure. This could lead to local information disclosure in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

Frequently asked questions

What is CVE-2023-21227?: In HTBLogKM of htbserver.c, there is a possible information disclosure due to log information disclosure. This could lead to local information disclosure in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.
How severe is CVE-2023-21227?: CVE-2023-21227 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-21227 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21227?: CVE-2023-21227 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-21227?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-21227 published?: CVE-2023-21227 was published on 2023-12-04 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/2023-12-01

Affected products (1)

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

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