CVE-2026-98249

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux788bfdd97434982b6d575062581e8e72eea755af < 6646418d1032cac25110526161f60d255ed08397affected
LinuxLinux788bfdd97434982b6d575062581e8e72eea755af < 909e92423db7299e0206232051aa21fe129f65d0affected
LinuxLinux788bfdd97434982b6d575062581e8e72eea755af < 60a3c319f1127c4d247d4ed235c5d65376d5e745affected
LinuxLinux788bfdd97434982b6d575062581e8e72eea755af < e80ea8118a073a30ebe7a31bd78938c2b1751accaffected
LinuxLinux788bfdd97434982b6d575062581e8e72eea755af < d3f8f773312af69eaf4dda106d76d6d42e4362e5affected
LinuxLinux788bfdd97434982b6d575062581e8e72eea755af < 955d86e5f3b95b731991fdb84966c50b16314629affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References