What’s Vulnerable › Vulnerabilities

CVE-2011-2480

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-11-27 · updated 2026-06-16
• Weakness: CWE-200

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.

Affected products

• FreeBSD: before 8.2 — fixed in 8.2
• Netbsd: all versions

How to fix

Upgrade to a fixed version: FreeBSD 8.2. Check the vendor advisory for mitigations.

References

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

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