What’s Vulnerable › Vulnerabilities

CVE-2021-39642

• Severity: medium (CVSS 6.4 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: 2021-12-15 · updated 2026-06-17
• Weakness: CWE-362

Description

In synchronous_process_io_entries of lwis_ioctl.c, there is a possible out of bounds write due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-195731663References: N/A

Affected products

• Android: all versions

References

• https://source.android.com/security/bulletin/pixel/2021-12-01
• https://source.android.com/security/bulletin/pixel/2021-12-01

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