arm64: hibernate: pass HVC_SET_VECTORS args to the resume hvc

Summary

In the Linux kernel, the following vulnerability has been resolved: arm64: hibernate: pass HVC_SET_VECTORS args to the resume hvc swsusp_arch_suspend_exit() reinstalls the restored kernel's hyp stub vectors with an hvc, but never passes the arguments. x0 is not set to HVC_SET_VECTORS and x1 is not set to the vector address, so the stub dispatch falls through and returns without writing vbar_el2. EL2 is left pointing at the trans_pgd copy of the vectors, a page that swsusp_free() releases right after resume. Set the arguments up the same way __hyp_set_vectors() does. Without this fix, Vladimir was able to trigger a hang when resuming from hibernation with CONFIG_PAGE_POISONING=y and page_poison=on.

Timeline

1. Oct 6, 2026, 8:45 AM UTCCVE published
2. Oct 19, 2026, 9:16 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 788bfdd97434982b6d575062581e8e72eea755af · fixed in 6646418d1032cac25110526161f60d255ed08397; From 788bfdd97434982b6d575062581e8e72eea755af · fixed in 909e92423db7299e0206232051aa21fe129f65d0; From 788bfdd97434982b6d575062581e8e72eea755af · fixed in 60a3c319f1127c4d247d4ed235c5d65376d5e745; From 788bfdd97434982b6d575062581e8e72eea755af · fixed in e80ea8118a073a30ebe7a31bd78938c2b1751acc; From 788bfdd97434982b6d575062581e8e72eea755af · fixed in d3f8f773312af69eaf4dda106d76d6d42e4362e5; From 788bfdd97434982b6d575062581e8e72eea755af · fixed in 955d86e5f3b95b731991fdb84966c50b16314629

• Linux Linux

  5.16

• KernelLinux

  From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.54; From 6.19.0 · fixed in 7.2.8

References 6