What’s Vulnerable › Vulnerabilities

CVE-2023-21401

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-04 · updated 2026-06-17

Description

In DevmemIntChangeSparse of devicemem_server.c, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected products

• Android: all versions

References

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

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