Vulnerability in Linux Kernel
CVE-2017-15129
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.
Vulnerability class: Race Condition
EPSS: 0.004 (29.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Linux_kernel — versions 4.15
- Canonical Ubuntu_linux — versions 14.04, 16.04, 17.10
- Fedoraproject Fedora — versions 27
- Redhat Enterprise_linux — versions 7.0
- Redhat Enterprise_linux_compute_node_eus — versions 7.4
- Redhat Enterprise_linux_desktop — versions 7.0
- Redhat Enterprise_linux_eus — versions 7.4, 7.6, 7.7
- Redhat Enterprise_linux_for_ibm_z_systems — versions 7.0
- Redhat Enterprise_linux_for_ibm_z_systems_eus — versions 7.4
- Redhat Enterprise_linux_for_power_big_endian — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (Patch, Mailing List, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Mailing List, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (x_refsource_MISC, Release Notes)
- secalert@redhat.com (Patch, x_refsource_MISC)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-15129?
- CVE-2017-15129 is a medium-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2018-01-09.
- How severe is CVE-2017-15129?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2017-15129 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.