CVE-2012-4565

4.7 MEDIUM 0.5% exploit odds Fix listed

What it is

The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.

At a glance

Exploitability: Can be exploited locally on the machine without logging in. High risk of service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-12-21 11:47 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:45 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 4.7 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-12-21 11:47 UTC
Last modified: 2026-06-16 23:45 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-189
Record status: Modified

Affected

Linux Kernel ≤ 3.4.18
Linux Kernel 3.4.1
Linux Kernel 3.4.2
Linux Kernel 3.4.3
Linux Kernel 3.4.4
Linux Kernel 3.4.5
Linux Kernel 3.4.6
Linux Kernel 3.4.7

Attack profile CVSS 2.0 · 4.7

Attack vector: Local
Complexity: Medium
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:L/AC:M/Au:N/C:N/I:N/A:C

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-2012-4565.md and follow it. Check whether this project is affected by CVE-2012-4565. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

· More options · Status badge

Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record