Late to post about this but the security preview variant of this release fixes SIX **CRITICIAL** CVEs that will not be fixed elsewhere for a while except in #GrapheneOS because security patches are not included into an Android Security Bulletin until around 3-4 months after their release.
- Critical: CVE-2026-0039, CVE-2026-0040, CVE-2026-0041, CVE-2026-0042, CVE-2026-0043, CVE-2026-0044
OEMs do not deliver security patches in a timely manner. In a rare case it is sometimes only done in part, and often will only do so after the ASB is released. That dangerously long period of security vulnerabilities being known and unlatched is unacceptable.
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For newcomers, this model is a layered pyramid that ranks indicators of compromise by a linear level of difficulty and cost for the threat actor to evade security measures to perform an attack; The bottom of the pyramid being very easy and trivial for the threat actor to change and the top being tough.
This model opens newcomers on how good security strategy is built: Techniques and capabilities over individual actors. Closing out tactics, techniques and procedures are far more important than blocking an IP address or a file hash. You want to protect against a type of attack, not against a particular actor who performs them.
The point of having extensive hardening features is that we need to ensure vulnerabilities that would affect Android are benign, harder to exploit or patched in GrapheneOS before they can be exploited. Android distributions carry the weight of vulnerabilities from upstream. To reduce that weight, we need to make sure a highly sophisticated exploit developer would have to uniquely design their exploit to target GrapheneOS, should they be able to at all.
Without that, GrapheneOS wouldn't be special. It would not be sensible to claim it is more security and privacy focused than Android if it was able to be exploited through the exact same mechanisms with little or no effort needed to port. An Android distribution that is just Android without Google services is mostly as exploitable as Android. Something that is "DeGoogled" (I don't use the term, it's Reddit tier buzzword nonsense) may not necessarily be safer to use either.
To earn the title of being hardened it needs more, but this isn't ever implemented well enough. Projects that have done so to the best of their ability also have died (DivestOS).
Our hardening features are available outside of GrapheneOS. Leading example of this is secureblue, a security hardened Linux distribution (