UBUNTU-CVE-2017-15129

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UBUNTU-CVE-2017-15129

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2017-15129, https://git.kernel.org/linus/21b5944350052d2583e82dd59b19a9ba94a007f0, https://ubuntu.com/security/notices/USN-3617-1, https://ubuntu.com/security/notices/USN-3617-2, https://ubuntu.com/security/notices/USN-3617-3, https://ubuntu.com/security/notices/USN-3619-1, https://ubuntu.com/security/notices/USN-3619-2, https://ubuntu.com/security/notices/USN-3632-1, https://www.cve.org/CVERecord?id=CVE-2017-15129