CVE-2026-98249

Description

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.

References

• https://git.kernel.org/stable/c/60a3c319f1127c4d247d4ed235c5d65376d5e745
• https://git.kernel.org/stable/c/6646418d1032cac25110526161f60d255ed08397
• https://git.kernel.org/stable/c/909e92423db7299e0206232051aa21fe129f65d0
• https://git.kernel.org/stable/c/955d86e5f3b95b731991fdb84966c50b16314629
• https://git.kernel.org/stable/c/d3f8f773312af69eaf4dda106d76d6d42e4362e5