CVE-2018-8781

The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c at the Linux kernel version 3.4 and up to and including 4.15 has an integer-overflow vulnerability allowing local users with access to the udldrmfb driver to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space.

Published: 2018-04-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-8781 is rated Moderate Risk (45.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-8781

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.10% 0.50% +0.40%
2 2025-05-28 0.04% 0.10% +0.06%
3 2025-03-30 — 0.04% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-8781

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2018-8781

OS Trackers for CVE-2018-8781

vendor priority summary link
debian not yet assigned CVE-2018-8781 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-8781
redhat high — https://access.redhat.com/security/cve/CVE-2018-8781
suse medium CVE-2018-8781 severity moderate: SUSE including 247 source package names (bpftool-3.10.0-957.el7, cluster-md-kmp-default-4.12.14-120.1, …), 569 product×package rows across 100 product lines (SLES for SAP Applications 11 SP2, SUSE CaaS Platform 4.5, … (100 product lines)): Fixed 388, Known Not Affected 181. https://www.suse.com/security/cve/CVE-2018-8781/
ubuntu medium CVE-2018-8781 medium priority: Ubuntu including 76 source packages (linux, linux-aws, …), 610 status rows across 10 suites (artful, bionic, cosmic, focal, jammy, noble, oracular, trusty, upstream, xenial): DNE 388, not-affected 119, released 93, ignored 10. https://ubuntu.com/security/CVE-2018-8781

Affected software / configurations for CVE-2018-8781

Vendor Product Version Raw CPE
linux linux_kernel >= 3.4, < 3.16.57 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.17, < 3.18.103 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.19, < 4.1.52 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.2, < 4.4.125 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.5, < 4.9.91 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.10, < 4.14.31 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.15, < 4.15.14 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 17.10 cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

References for CVE-2018-8781

URL Tags
https://access.redhat.com/errata/RHSA-2018:2948 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3083 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3096 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html Mailing List Third Party Advisory
https://patchwork.freedesktop.org/patch/211845/ Issue Tracking Patch Third Party Advisory
https://research.checkpoint.com/mmap-vulnerabilities-linux-kernel/ Third Party Advisory
https://usn.ubuntu.com/3654-1/ Third Party Advisory
https://usn.ubuntu.com/3654-2/ Third Party Advisory
https://usn.ubuntu.com/3656-1/ Third Party Advisory
https://usn.ubuntu.com/3674-1/ Third Party Advisory
https://usn.ubuntu.com/3674-2/ Third Party Advisory
https://usn.ubuntu.com/3677-1/ Third Party Advisory
https://usn.ubuntu.com/3677-2/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4187 Third Party Advisory
https://www.debian.org/security/2018/dsa-4188 Third Party Advisory
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