MEDIUM
CVE-2011-4112
NVD-CWE-noinfoPublished: May 17, 2012· Updated: Jun 16, 2026
5.5
CVSS v3.1
Official 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.
Technical Analysis
CVE-2011-4112 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (12)
→
http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
→
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://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
Quick Facts
CVE IDCVE-2011-4112
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected2 vendor(s)
PublishedMay 17, 2012
Related CVEs (NVD-CWE-noinfo)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2011-4112 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.