CVE-2013-5666

What it is

The sendfile system-call implementation in sys/kern/uipc_syscalls.c in the kernel in FreeBSD 9.2-RC1 and 9.2-RC2 does not properly pad transmissions, which allows local users to obtain sensitive information (kernel memory) via a length greater than the length of the file.

At a glance

Exploitability

Can be exploited locally on the machine without logging in. High risk of data exposure.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2013-09-23 20:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:59 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 4.7 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2013-09-23 20:55 UTC

Last modified

2026-06-16 23:59 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• Freebsd 9.2

Attack profile CVSS 2.0 · 4.7

Attack vector

Local

Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2013-5666.md and follow it. Check whether this project is affected by CVE-2013-5666. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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