Use-after-free vulnerability in the nfqnl_zcopy function in net/netfilter/nfnetlink_queue_core.c in the Linux kernel through 3.13.6 allows attackers to obtain sensitive information from kernel memory by leveraging the absence of a certain orphaning operation. NOTE: the affected code was moved to the skb_zerocopy function in net/core/skbuff.c before the vulnerability was announced.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 5.5
CVSS Version 2 Metrics:
Access Vector: Local network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information
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[oss-sec] 20140320 CVE request -- kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied
[oss-security] 20140320 Re: CVE request -- kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied
[linux-kernel] 20140320 [PATCH v3] core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors