CVE-2011-4112
CVE-2011-4112 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- CVSS v2: 4.9
- EPSS exploit prediction: 0% (39th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2011-4112?
- CVE-2011-4112 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2011-4112 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-4112?
- CVE-2011-4112 primarily affects Linux Linux Kernel. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-4112?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2011-4112 published?
- CVE-2011-4112 was published on 2012-05-17 and last updated on 2026-06-16.
References
- http://downloads.avaya.com/css/P8/documents/100156038
- 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-3.1
- http://www.openwall.com/lists/oss-security/2011/11/21/4
- https://bugzilla.redhat.com/show_bug.cgi?id=751006
- https://github.com/torvalds/linux/commit/550fd08c2cebad61c548def135f67aba284c6162
Affected products (7)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:avaya:9608_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:avaya:9608g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:avaya:9611g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:avaya:9621g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:avaya:9641g_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:avaya:9641gs_firmware:*:*:*:*:*:*:*:*
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