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Vulnerability record · CVE-2018-20669 · published 21 March 2019

CVE-2018-20669: Linux kernel improper input validation vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.58% · top 53.8% CWE-20 · Improper input validation
7.8CVSS 3.1 base score, v2 7.2
0.58%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/i915/i915_gem_execbuffer.c Release NotesVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/01/23/6 ExploitMailing ListPatchThird Party Advisory
http://www.securityfocus.com/bid/106748 Broken LinkThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/cve-2018-20669 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190404-0002/ Third Party Advisory
https://support.f5.com/csp/article/K32059550 Third Party Advisory
https://usn.ubuntu.com/4485-1/ Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/i915/i915_gem_execbuffer.c Release NotesVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2019/01/23/6 ExploitMailing ListPatchThird Party Advisory
http://www.securityfocus.com/bid/106748 Broken LinkThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/cve-2018-20669 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190404-0002/ Third Party Advisory
https://support.f5.com/csp/article/K32059550 Third Party Advisory
https://usn.ubuntu.com/4485-1/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-20669), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.