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Fencer Intel
high 7.0

CVE-2017-18202 json

The __oom_reap_task_mm function in mm/oom_kill.c in the Linux kernel before 4.14.4 mishandles gather operations, which allows attackers to…

published 2018-02-27 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9335

cvss
7.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

The __oom_reap_task_mm function in mm/oom_kill.c in the Linux kernel before 4.14.4 mishandles gather operations, which allows attackers to cause a denial of service (TLB entry leak or use-after-free) or possibly have unspecified other impact by triggering a copy_to_user call within a certain time window.

Patch / fix

  • linux linux_kernel 4.9.68, 4.14.4
  • linux Debian 14, Debian 13, Debian 12 4.14.7-1

debian advisories DEBIAN-CVE-2017-18202

  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1014.14~16.04.1
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-24.26~16.04.1
  • linux-azure Ubuntu 16.04 LTS 4.15.0-1013.13~16.04.2

ubuntu advisories UBUNTU-CVE-2017-18202

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-alt RHEL 7 4.14.0-49.13.1.el7a
  • perf RHEL 7 4.14.0-49.13.1.el7a
  • kernel RHEL 7 4.14.0-49.13.1.el7a
  • python-perf RHEL 7 4.14.0-49.13.1.el7a
  • kernel-kdump RHEL 7 4.14.0-49.13.1.el7a
  • kernel-tools RHEL 7 4.14.0-49.13.1.el7a
  • kernel-tools-libs RHEL 7 4.14.0-49.13.1.el7a
  • kernel-bootwrapper RHEL 7 4.14.0-49.13.1.el7a

red hat advisories RHSA-2018:2772

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-18202 updated cvss 6.7

kernel: Infoleak/use-after-free in __oom_reap_task_mm function in mm/oom_kill.c

  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) perf 4.14.0-49.13.1.el7a, kernel 4.14.0-49.13.1.el7a, kernel-alt 4.14.0-49.13.1.el7a, python-perf 4.14.0-49.13.1.el7a, kernel-kdump 4.14.0-49.13.1.el7a, kernel-tools 4.14.0-49.13.1.el7a, +6 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debuginfo-common-aarch64 4.14.0-49.13.1.el7a, kernel-debuginfo-common-ppc64le 4.14.0-49.13.1.el7a
    fixed: vendor fix RHSA-2018:2772
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-core, kernel-tools, python3-perf, +17 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.