What’s Vulnerable › Vulnerabilities

CVE-2021-39680

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-14 · updated 2026-06-17
• Weakness: CWE-908

Description

In sec_SHA256_Transform of sha256_core.c, there is a possible way to read heap data due to uninitialized data. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-197965864References: N/A

Affected products

• Android: all versions

References

• https://source.android.com/security/bulletin/pixel/2022-01-01
• https://source.android.com/security/bulletin/pixel/2022-01-01

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