CVE-2017-15129

moderate-risk
Published 2018-01-09

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.

Do I need to act?

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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
LOCAL / HIGH complexity

Affected Products (20)

Enterprise Linux Compute Node Eus

Affected Vendors

Redhat Linux Canonical Fedoraproject

References (38)

Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21b594...
Mailing List http://seclists.org/oss-sec/2018/q1/7
Broken Link http://www.securityfocus.com/bid/102485
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0654
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0676
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:1062
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:1946
Third Party Advisory https://access.redhat.com/security/cve/CVE-2017-15129
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1531174
Patch https://github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f...
Mailing List https://marc.info/?l=linux-netdev&m=151370451121029&w=2
Mailing List https://marc.info/?t=151370468900001&r=1&w=2
Third Party Advisory https://usn.ubuntu.com/3617-1/
Third Party Advisory https://usn.ubuntu.com/3617-2/
Third Party Advisory https://usn.ubuntu.com/3617-3/
Third Party Advisory https://usn.ubuntu.com/3619-1/
Third Party Advisory https://usn.ubuntu.com/3619-2/
Third Party Advisory https://usn.ubuntu.com/3632-1/
Release Notes https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=21b594...
and 18 more references
34
/ 100
moderate-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 22/34 · High