The crosshatch kernel repository (github.com/GrapheneOS/ker) is now used for the Pixel 3a and Pixel 3a XL in addition to the Pixel 3 and Pixel 3 XL. GrapheneOS will still use specialized kernel builds for each device with varying modules to improve CFI and reduce attack surface.
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You have been speaking much of kernel insecurity, and i jsut read the news today about new 0-day ---thehackernews.com/2019/10/androi
Btw Pixel 3 seems not to be invloled...
PLs can u tell if Pixel 3a have same kernel security as Pixel 3?
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Pixel 3 and 3a have comparable security and use the same kernel source tree. This issue was also mitigated on GrapheneOS by CONFIG_DEBUG_LIST + CONFIG_PANIC_ON_DATA_CORRUPTION. Please see what I've written about this issue:
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In the past, when GrapheneOS was in a better state, the latest kernel.org LTS branches were promptly merged along with additional fixes not included in the upstream branches. The fix for the bug now assigned CVE-2019-2215 was already applied for the Pixel 1 and 2.
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It's worth noting that CONFIG_DEBUG_LIST is enabled in GrapheneOS with panic on data corruption, which according to bugs.chromium.org/p/project-zero breaks the exploit primitive. However, this is just one vulnerability, and many won't be mitigated like that.
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Thanks so much for your answer, and big thank for what you are doing.. i wish i could do anything to help!