In modpowF4 of avb_rsa.c, there is a possible signature verification bypass due to a logic error in the code.

Summary

In modpowF4 of avb_rsa.c, there is a possible signature verification bypass due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Remediation

1. Inventory every Google Android deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Referencehttps://source.android.com/docs/security/bulletin/2026/2026-11-01