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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (29.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linux Kernel — versions 4.15
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Fedoraproject Fedora — versions 27
- Red Hat Enterprise Linux — versions 7.0
- Red Hat Enterprise Linux Compute Node Eus — versions 7.4
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Eus — versions 7.4, 7.6, 7.7
- Red Hat Enterprise Linux For IBM Z Systems — versions 7.0
- Red Hat Enterprise Linux For IBM Z Systems Eus — versions 7.4
- Red Hat Enterprise Linux For Power Big Endian — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- usn.ubuntu.com/3617-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3619-2/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3617-3/ (vendor-advisory, Third Party Advisory)
- marc.info/ (Patch, Mailing List, Third Party Advisory)
- marc.info/ (Mailing List, Third Party Advisory)
- usn.ubuntu.com/3632-1/ (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11 (Release Notes)
- github.com/torvalds/linux/commit/21b5944350052d2583e82dd59b19a9ba94a007f0 (Patch)
- access.redhat.com/errata/RHSA-2018:1062 (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.