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Fencer Intel
high 7.8

CVE-2018-20669 json

An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915…

published 7y ago modified 4mo ago also EUVD-2018-13220

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.

Patch / fix

  • linux linux_kernel 4.14.185, 4.19.129, 5.0
  • linux Debian 14, Debian 13, Debian 12 5.2.6-1

debian advisories DEBIAN-CVE-2018-20669

  • linux Ubuntu 18.04 LTS 4.15.0-115.116
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1080.84
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1081.92~16.04.1
  • linux-gcp Ubuntu 18.04 LTS 5.0.0-1020.20~18.04.1
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-115.116~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.0.0-23.24~18.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1072.73
  • linux-oem Ubuntu 18.04 LTS 4.15.0-1094.104

ubuntu advisories UBUNTU-CVE-2018-20669

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-syms SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.57.1
  • kernel-source SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-122.57.1
  • kernel-default SLES for SAP 12 SP5, SLES 12 SP5, SLE Workstation Extension 12 SP5 +2 more 4.12.14-122.57.1
  • kernel-obs-build SLE Software Development Kit 12 SP5 4.12.14-122.57.1
  • kernel-syms SLE Module for Development Tools 15 SP1 4.12.14-197.78.1
  • kernel-source SLE Module for Development Tools 15 SP1, SLE Module for Basesystem 15 SP1 4.12.14-197.78.1
  • kernel-default SLE Workstation Extension 15 SP1, SLE Module for Legacy 15 SP1, SLE Module for Basesystem 15 SP1 +2 more 4.12.14-197.78.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP1 4.12.14-197.78.1

suse advisories SUSE-SU-2021:0133-1SUSE-SU-2021:0118-1SUSE-SU-2021:0098-1SUSE-SU-2021:0097-1SUSE-SU-2020:3798-1SUSE-SU-2020:3766-1

  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.87.1
  • kernel-obs-qa openSUSE Leap 15.1 4.12.14-lp151.28.87.2
  • kernel-source openSUSE Leap 15.1 4.12.14-lp151.28.87.1
  • kernel-default openSUSE Leap 15.1 4.12.14-lp151.28.87.2
  • kernel-vanilla openSUSE Leap 15.1 4.12.14-lp151.28.87.2
  • kernel-kvmsmall openSUSE Leap 15.1 4.12.14-lp151.28.87.2
  • kernel-obs-build openSUSE Leap 15.1 4.12.14-lp151.28.87.2
  • kernel-source openSUSE Leap 15.0 4.12.14-lp150.12.48.1

opensuse advisories openSUSE-SU-2020:2193-1openSUSE-SU-2019:0203-1

Is CVE-2018-20669 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2018-20669 updated cvss 7.8

kernel: missing access_ok() checks in i915_gem_execbuffer2_ioctl() results in priviledge escalation

  • Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more
    affected: no fix available
  • 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 kernel, bpftool, kernel-rt, kernel-rt-kvm, kernel-rt-trace, kernel-rt-debug-kvm, +1 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 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

0.58% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • openwall.com http://www.openwall.com/lists/oss-security/2019/01/23/6 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation
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.