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Checkm8: History, History and release & Technical details

checkm8 is an unpatchable BootROM exploit, first discovered in 2019 by axi0mX, an independent iOS security researcher. It affects all devices from iPhone 4s to iPhone X and requires the device to be in DFU mode to be exploited.

Language: English [EN]
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Checkm8 topic overview

The analysis highlights History, History and release and Technical details as prominent areas in the source structure around Checkm8.

Related topics
5
Source areas
3
Connected nodes
8
Extracted relationships
51
Concept neighborhoods
6
Bridge connections
8

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 3 topics
History and release · 1 topics
Technical details · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Affected hardware
Apple A5 to A11 SoCs (iPhone 4s to iPhone X)
Affected software
iOS, watchOS, tvOS
CVE identifier
CVE-2019-8900
Date discovered
September 27, 2019; 6 years ago (2019-09-27)
Date patched
None (Unpatchable in hardware)
Discoverer
axi0mX

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Technical details

History and release

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Checkm8 connects Entity context

The extracted context around Checkm8 shows recurring relationship patterns in the source. For example, Checkm8 → A11, A5, Air, Apple, GenerationiPad Mini, Pro, Series, The, Touch, TV, Watch Series, XiPad Another extracted example is Checkm8 → A11, A5, Apple, GitHub, It, On September, September, The. Use these groups to spot repeated connection types before inspecting the individual relationships.

Checkm8

Top relations

related to Affected devices · 12
Checkm8 → A11, A5, Air, Apple, GenerationiPad Mini, Pro, Series, The, Touch, TV, Watch Series, XiPad
related to history · 8
Checkm8 → A11, A5, Apple, GitHub, It, On September, September, The
related to Limitations and mitigations · 8
Checkm8 → A11 Bionic, A12, A12 Bionic, A13, However, S4/S5, Secure Enclave Processor, SEP
has application · 6
Checkm8 → Apple, Apple's, Internet Activities, It, Location-Based, The
related to Technical details · 5
Checkm8 → BootROM, DFU, The, UAF, Use-After-Free
Affected hardware · 1
Checkm8 → Apple A5 to A11 SoCs (iPhone 4s to iPhone X)
Affected software · 1
Checkm8 → iOS, watchOS, tvOS
CVE identifier · 1
Checkm8 → CVE-2019-8900
Date discovered · 1
Checkm8 → September 27, 2019; 6 years ago (2019-09-27)
Date patched · 1
Checkm8 → None (Unpatchable in hardware)

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

exploit devices ios apple used unpatchable jailbreaking chip security device bootrom also a11 axi0mx iphone 4s affected 2019 dfu checkra1n

Checkm8 relationships Subject–Predicate–Object triples

TTTA extracted 51 structured relationships around Checkm8. Examples in this analysis include Checkm8 → Affected hardware → Apple A5 to A11 SoCs (iPhone 4s to iPhone X) and Checkm8 → Affected software → iOS, watchOS, tvOS. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Checkm8Affected hardwareApple A5 to A11 SoCs (iPhone 4s to iPhone X)1.00infobox
Checkm8Affected softwareiOS, watchOS, tvOS1.00infobox
Checkm8CVE identifierCVE-2019-89001.00infobox
Checkm8Date discoveredSeptember 27, 2019; 6 years ago (2019-09-27)1.00infobox
Checkm8Date patchedNone (Unpatchable in hardware)1.00infobox
Checkm8Discovereraxi0mX1.00infobox
Checkm8Used bycheckra1n, palera1n1.00infobox
Checkm8is aunpatchable BootROM exploit0.90text
Location-Based datainstance ofIt also helps examine new realms of data for Apple devices0.80text
examination of Internet Activitiesinstance ofIt also helps examine new realms of data for Apple devices0.80text
allows the ability to trace digital footprintsinstance ofIt also helps examine new realms of data for Apple devices0.80text
devices based on the A11 Bionic chip through iOS 16 updates. iOS 16 includes SEPinstance ofLimitations and mitigationscheckm8 has had its functions and exploit heavily restricted and limited for newer devices0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Checkm8 bring nearby vocabulary together. In this analysis, examples include Apple, Affected and Axi0mx. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Checkm8
    • Apple
    • Affected
    • Axi0mx
    • Checkra1n
    • Hardware
    • Exploit
    • A11
    • Unpatchable
    • Devices
    • Ios
    • Used
    • Discovered
  • checkm8
    • Apple
    • Affected
    • Axi0mx
    • Checkra1n
    • Hardware
    • Exploit
    • A11
    • Unpatchable
    • Devices
    • Ios
    • Used
    • Discovered
  • iphone 4s
    • Iphone
    • Palera1n
    • Affected
    • Checkra1n
    • Hardware
    • Used
    • Apple
    • Affects
    • Checkm8
    • Discovered
    • Mode
    • Patched
  • bootrom
    • Discovered
    • Use-after-free
    • Vulnerability
    • Ios
    • Axi0mx
    • Security
    • Unpatchable
    • Checkm8
    • First
    • Palera1n
    • Patched
    • Software
  • iphone x
    • Palera1n
    • Affected
    • Checkra1n
    • Hardware
    • Used
    • Apple
    • Mode
    • Patched
    • Software
    • Use-after-free
    • Vulnerability
    • A5
  • use-after-free
    • Vulnerability
    • Used

Connections between topic areas Semantic bridges

For Checkm8, one of the stronger structural bridges in this analysis connects Checkm8 with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Checkm8Overview · splits 5 ⟂ 4

Map overview Semantic statistics

Checkm8

Nodes9
Edges8
Triples51
Avg. degree1.78
Density0.222222
Components1

Source & methodology

TTTA analyzes the structure around Checkm8 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, History and release & Technical details, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Checkm8 · EN edition · Analysis: TopicsToTalkAbout

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