CVE ID:	CVE-2017-15129
Description:	A use-after-free vulnerability was found in network namespaces code affecting the Linux kernel before 4.14.11. The function get_net_ns_by_id() in net/core/net_namespace.c does not check for the net::count value after it has found a peer network in netns_ids idr, which could lead to double free and memory corruption. This vulnerability could allow an unprivileged local user to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is thought to be unlikely.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2017-15129 102485 http://www.securityfocus.com/bid/102485 RHSA-2018:0654 https://access.redhat.com/errata/RHSA-2018:0654 RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:0676 RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2018:1062 RHSA-2019:1946 https://access.redhat.com/errata/RHSA-2019:1946 USN-3617-1 https://usn.ubuntu.com/3617-1/ USN-3617-2 https://usn.ubuntu.com/3617-2/ USN-3617-3 https://usn.ubuntu.com/3617-3/ USN-3619-1 https://usn.ubuntu.com/3619-1/ USN-3619-2 https://usn.ubuntu.com/3619-2/ USN-3632-1 https://usn.ubuntu.com/3632-1/ http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21b5944350052d2583e82dd59b19a9ba94a007f0 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21b5944350052d2583e82dd59b19a9ba94a007f0 http://seclists.org/oss-sec/2018/q1/7 http://seclists.org/oss-sec/2018/q1/7 https://access.redhat.com/security/cve/CVE-2017-15129 https://access.redhat.com/security/cve/CVE-2017-15129 https://bugzilla.redhat.com/show_bug.cgi?id=1531174 https://bugzilla.redhat.com/show_bug.cgi?id=1531174 https://github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f0 https://github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f0 https://marc.info/?l=linux-netdev&m=151370451121029&w=2 https://marc.info/?l=linux-netdev&m=151370451121029&w=2 https://marc.info/?t=151370468900001&r=1&w=2 https://marc.info/?t=151370468900001&r=1&w=2 https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11 https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11