CVE-2011-4112

Name: CVE-2011-4112
Creator: NVD / NIST
Published: 2012-05-17T11:00:32.757+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.47%

Last modified Jun 16, 2026

CVE-2011-4112 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. The net subsystem in the Linux kernel before 3.1 does not properly restrict use of the IFF_TX_SKB_SHARING flag, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability to access /proc/net/pktgen/pgctrl, and then using the pktgen package in conjunction with a bridge device for a VLAN interface.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

The net subsystem in the Linux kernel before 3.1 does not properly restrict use of the IFF_TX_SKB_SHARING flag, which allows local users to cause a denial of service (panic) by leveraging the CAP_NET_ADMIN capability to access /proc/net/pktgen/pgctrl, and then using the pktgen package in conjunction with a bridge device for a VLAN interface.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.47%

36.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 3.1
Avaya	9608 Firmware	>= 6.0, <= 6.6.0
Avaya	9608g Firmware	>= 6.0, <= 6.6.0
Avaya	9611g Firmware	>= 6.0, <= 6.6.0
Avaya	9621g Firmware	>= 6.0, <= 6.6.0
Avaya	9641g Firmware	>= 6.0, <= 6.6.0
Avaya	9641gs Firmware	>= 6.0, <= 6.6.0

References

http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=550fd08c2cebad61c548def135f67aba284c6162
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1Mailing List, Patch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2011/11/21/4Mailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=751006Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162Patch, Third Party Advisory
http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=550fd08c2cebad61c548def135f67aba284c6162
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1Mailing List, Patch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2011/11/21/4Mailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=751006Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162Patch, Third Party Advisory

Timeline

Published: May 17, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-4112?

How severe is CVE-2011-4112?

CVE-2011-4112 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2011-4112?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-4112?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST