What’s Vulnerable › Vulnerabilities
CVE-2011-4112
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2012-05-17 · updated 2026-06-16
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.
Affected products
- Avaya 9608 Firmware: from 6.0 through 6.6.0
- Avaya 9608G Firmware: from 6.0 through 6.6.0
- Avaya 9611G Firmware: from 6.0 through 6.6.0
- Avaya 9621G Firmware: from 6.0 through 6.6.0
- Avaya 9641G Firmware: from 6.0 through 6.6.0
- Avaya 9641Gs Firmware: from 6.0 through 6.6.0
- Linux kernel: before 3.1 — fixed in 3.1
How to fix
Upgrade to a fixed version: Linux kernel 3.1. Check the vendor advisory for mitigations.
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
- 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
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