What is CVE-2017-15649?

CVE-2017-15649 is a high-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.8/10. Published 2017-10-19.

How severe is CVE-2017-15649?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2017-15649 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2017-15649

net/packet/af_packet.c in the Linux kernel before 4.13.6 allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free, a different vulnerability than CVE-2017-6346.

Vulnerability class: Race Condition

Published 2017-10-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.3th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

Public proof-of-concept exploits

References

git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Third Party Advisory)
blogs.securiteam.com/index.php/archives/3484 (Third Party Advisory)
www.securityfocus.com/bid/101573 (VDB Entry, Third Party Advisory, vdb-entry)
lists.debian.org/debian-lts-announce/2017/12/msg00004.html (mailing-list)
access.redhat.com/errata/RHSA-2018:0181 (vendor-advisory)
patchwork.ozlabs.org/patch/813945/ (Third Party Advisory, Issue Tracking)
usn.ubuntu.com/3754-1/ (vendor-advisory)
access.redhat.com/errata/RHSA-2018:0152 (vendor-advisory)
patchwork.ozlabs.org/patch/818726/ (Third Party Advisory)
access.redhat.com/errata/RHSA-2018:0151 (vendor-advisory)

Frequently asked questions

What is CVE-2017-15649?: CVE-2017-15649 is a high-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.8/10. Published 2017-10-19.
How severe is CVE-2017-15649?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2017-15649 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.