Vulnerability Monitor

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CVE-2011-4112

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 13 products from linux, from avaya, from avaya and 10 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2012, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2012-05-17T11:00:32.757

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

6.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	< 3.1	Yes
Operating System	avaya	9608_firmware	≤ 6.6.0	Yes
Hardware	avaya	9608	-	No
Operating System	avaya	9608g_firmware	≤ 6.6.0	Yes
Hardware	avaya	9608g	-	No
Operating System	avaya	9611g_firmware	≤ 6.6.0	Yes
Hardware	avaya	9611g	-	No
Operating System	avaya	9621g_firmware	≤ 6.6.0	Yes
Hardware	avaya	9621g	-	No
Operating System	avaya	9641g_firmware	≤ 6.6.0	Yes
Hardware	avaya	9641g	-	No
Operating System	avaya	9641gs_firmware	≤ 6.6.0	Yes
Hardware	avaya	9641gs	-	No

References

http://downloads.avaya.com/css/P8/documents/100156038 Third Party Advisory ([email protected])
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=550fd08c2cebad61c548def135f67aba284c6162 ([email protected])
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1 Mailing List, Patch, Vendor Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2011/11/21/4 Mailing List, Patch, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=751006 Exploit, Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162 Patch, Third Party Advisory ([email protected])
http://downloads.avaya.com/css/P8/documents/100156038 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=550fd08c2cebad61c548def135f67aba284c6162 (af854a3a-2127-422b-91ae-364da2661108)
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1 Mailing List, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2011/11/21/4 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=751006 Exploit, Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.