CASCACascade Atlas

Evidence dossier

CVE-2018-19323

The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes…

Exploited in the wild (CISA KEV since Oct 24, 2022). NVD reports CVSS 3.1 9.8. EPSS estimates 7.8% exploit likelihood as of Aug 27, 2026.

74.7–75.8Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes functionality to read and write Machine Specific Registers (MSRs).

State
PUBLISHED
Published
Dec 21, 2018
Updated
Oct 21, 2025
Evidence coverage
97%

Evidence chronology

What was known when

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  1. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    mitre

    Record text: The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes functionality to read and write Machine Specific Registers (MSRs).

    Inspect raw assertion
    Field
    container
    Value
    The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes functionality to read and write Machine Specific Registers (MSRs).
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: GIGABYTE Multiple Products Privilege Escalation Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    GIGABYTE Multiple Products Privilege Escalation Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 7.83% probability · 94.23th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.078280000000; percentile 0.942300000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Oct 24, 2022 · first observed Jul 19, 2026

Exploit likelihood7.83%

FIRST EPSS · score date Aug 27, 2026 · 94.2th percentile · first observed Aug 27, 2026

SeverityCVSS 9.8

NVD · CVSS 3.1 · first observed Jul 19, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Aug 27, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
mitreOriginal assertion
Record text

The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes functionality to read and write Machine Specific Registers (MSRs).

Inspect raw assertion
Field
container
Value
The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes functionality to read and write Machine Specific Registers (MSRs).
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

GIGABYTE Multiple Products Privilege Escalation Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
GIGABYTE Multiple Products Privilege Escalation Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

7.83% probability · 94.23th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.078280000000; percentile 0.942300000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
4Underlying assertions
4Canonical products
4Target assertions
0Constraint assertions

Grouped from 1 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

5 scope groups

mitre · source assertedn/an/aDirect source scope
Affected: n/a
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "n/a"}]
NVD CPE · APPLICATIONgigabyteaorus_graphics_engineVulnerable target · 1 assertions
Any version (unconstrained) (< 1.57)Canonical identity product-2251203ef560515a0490c1b7fac1194e1f2a2ac0124191dddde64ae325ea5f9fLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:gigabyte:aorus_graphics_engine:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 1.57
    Match ID
    01b70791-c11d-43f6-a6a9-c685a28ab151
NVD CPE · APPLICATIONgigabytegigabyte_app_centerVulnerable target · 1 assertions
Any version (unconstrained) (<= 1.05.21)Canonical identity product-7947fca8e70980805aceb645cfd40c4904d5998f35673909152aa072ee4a1f85Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:gigabyte:gigabyte_app_center:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    through including 1.05.21
    Match ID
    d6258771-cd9c-4c9e-98fa-dfc63eed2e5f
NVD CPE · APPLICATIONgigabyteoc_guru_iiVulnerable target · 1 assertions
Version 2.08Canonical identity product-40c3b9c31b19fde83d93ff0832a4b1bfc0a81caed83c1a433bcd8bcdb439cb79Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:gigabyte:oc_guru_ii:2.08:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    f437c1d5-60c5-417b-9685-ec93a7e5d58f
NVD CPE · APPLICATIONgigabytextreme_gaming_engineVulnerable target · 1 assertions
Any version (unconstrained) (< 1.26)Canonical identity product-6f982e95e73cc6c585817ef0fbce03e9460a44052dd870bcbddfce051b11688fLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:gigabyte:xtreme_gaming_engine:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    through excluding 1.26
    Match ID
    8222b91d-a7cd-44fd-b2c9-ba6a72e7194a

Affected-product evidence

Accepted scope and product mapping

4 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-7f6d373f72563d45518718a5148958b6749b18cdfde57bb0da87321f5c06ed09 · product-2251203ef560515a0490c1b7fac1194e1f2a2ac0124191dddde64ae325ea5f9f

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
b22deaaa-010b-48ff-bc17-25239491a767
Mapping establishedEvidence supported

vendor-7f6d373f72563d45518718a5148958b6749b18cdfde57bb0da87321f5c06ed09 · product-40c3b9c31b19fde83d93ff0832a4b1bfc0a81caed83c1a433bcd8bcdb439cb79

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
8ba8e353-4025-44b4-b21c-632bf2deb3af
Mapping establishedEvidence supported

vendor-7f6d373f72563d45518718a5148958b6749b18cdfde57bb0da87321f5c06ed09 · product-6f982e95e73cc6c585817ef0fbce03e9460a44052dd870bcbddfce051b11688f

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
74027d12-159f-4ae5-a7ab-efcd93b36b78
Mapping establishedEvidence supported

vendor-7f6d373f72563d45518718a5148958b6749b18cdfde57bb0da87321f5c06ed09 · product-7947fca8e70980805aceb645cfd40c4904d5998f35673909152aa072ee4a1f85

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
48cebb7f-21bd-4148-973f-1eb84cc7628e
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
6dc308f1-779a-4c25-a0e1-27bbef82ac2c

Assessments

CVSS by origin

9.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.0
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:N/C:P/I:P/A:C
9.8
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
CISA-ADPCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

9.8Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
9.8
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.