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.
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Affected products
1Patches
Vulnerability mechanics
References
6- git.kernel.org/stable/c/60a3c319f1127c4d247d4ed235c5d65376d5e745nvd
- git.kernel.org/stable/c/6646418d1032cac25110526161f60d255ed08397nvd
- git.kernel.org/stable/c/909e92423db7299e0206232051aa21fe129f65d0nvd
- git.kernel.org/stable/c/955d86e5f3b95b731991fdb84966c50b16314629nvd
- git.kernel.org/stable/c/d3f8f773312af69eaf4dda106d76d6d42e4362e5nvd
- git.kernel.org/stable/c/e80ea8118a073a30ebe7a31bd78938c2b1751accnvd
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