CVE-2011-4112
5.5 · MEDIUMThe 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_N…
Overview
CVE-2011-4112 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2012 and has a CVSS 3.1 base score of 5.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | >= 0, < 3.1 | Affected |
| avaya | 9608_firmware | 6.0 | Affected |
| avaya | 9608g_firmware | 6.0 | Affected |
| avaya | 9611g_firmware | 6.0 | Affected |
| avaya | 9621g_firmware | 6.0 | Affected |
| avaya | 9641g_firmware | 6.0 | Affected |
| avaya | 9641gs_firmware | 6.0 | Affected |
References
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Frequently asked questions
What is CVE-2011-4112?
CVE-2011-4112 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2012 and has a CVSS 3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2011-4112?
This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2011-4112?
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2011-4112?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-4112 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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