LiveActive security incident?Get immediate response
CVE Record

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 incl...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This is a local Linux kernel privilege escalation issue in the udldrmfb framebuffer driver. A user who already has local access and access to that driver could gain read and write access to kernel physical pages, potentially leading to kernel-level code execution.

Executive priority

Prioritize remediation on shared Linux hosts, workstations, and servers where local users or compromised low-privilege accounts could exist. The issue is not described as remote, but kernel-level code execution makes successful abuse high impact.

Technical view

CVE-2018-8781 affects Linux kernel versions 3.4 through 4.15 in udl_fb_mmap within drivers/gpu/drm/udl/udl_fb.c. The described flaw is an integer overflow that can grant excessive permissions over kernel physical pages to local users with access to udldrmfb.

Likely exposure

Exposure is most likely on older Linux systems running kernels from 3.4 through 4.15 where the udldrmfb driver is present and reachable by local users. Vendor advisories from Debian, Ubuntu, and Red Hat indicate distribution-level kernel updates were issued.

Exploitation context

The provided sources describe local exploitation requiring access to the affected driver. The bundle does not indicate CISA KEV listing or confirmed active exploitation. Treat it as a serious local privilege escalation risk, especially on shared systems or systems allowing untrusted local users.

Researcher notes

Focus validation on kernel version, driver availability, and local access paths to udldrmfb. The source bundle names the vulnerable function and affected kernel range, but does not provide CVSS, CWE classification, or evidence of active exploitation.

Mitigation direction

  • Apply the relevant vendor kernel security update for your distribution.
  • Reboot into the updated kernel after patch installation.
  • Disable or remove udldrmfb exposure where the driver is not required.
  • Limit untrusted local user access until affected systems are patched.
  • Check vendor advisories for exact fixed package versions.

Validation and detection

  • Inventory Linux systems running kernel versions 3.4 through 4.15.
  • Confirm whether the udldrmfb driver is installed, loaded, or accessible.
  • Verify the installed kernel package matches vendor-fixed versions.
  • Confirm systems have rebooted into the patched kernel.
  • Review Debian, Ubuntu, and Red Hat advisories for platform-specific coverage.
Prepared
Confidence
medium
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-8781 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
16Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Check Point Software Technologies Ltd.Linux Kernelkernel version 3.4 and up to and including 4.15Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.