CVE-2012-4565

Medium

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.

Package Linux Kernel
Published 2012-12-21
Last modified 2026-04-29
CVSS version 2.0
Patch available
Awaiting data

CVSS 2.0 score

4.7

out of 10
Medium
Attack Vector
Local
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
None
Integrity
None
Availability
Vector string
AV:L/AC:M/Au:N/C:N/I:N/A:C

Weakness type

CWE-189

CVE-2012-4565 is classified as CWE-189

See CWE-189 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2012-4565 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2012-4565?

    CVE-2012-4565 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 . CVE-2012-4565 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2012-4565?

    CVE-2012-4565 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:M/Au:N/C:N/I:N/A:C .

  • Is there a patch available for CVE-2012-4565?

    No patch is currently available for CVE-2012-4565. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2012-4565 actively exploited?

    No — CVE-2012-4565 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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