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Vulnerability Details :

CVE-2026-47143

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-21 Jul, 2026 | 20:10
Updated At-22 Jul, 2026 | 13:42
Rejected At-
Credits

Capstone has a NULL Pointer Dereference with 3DNow! opcodes

Capstone is a disassembly framework. Versions prior to 6.0.0-Alpha8 and 5.0.8 have a NULL pointer dereference in `modRMRequired()` and `decode()` when disassembling 3DNow! opcodes (`0F 0F`) in builds compiled with `-DCAPSTONE_X86_REDUCE`, allowing a remote attacker to crash any application using the reduced X86 Capstone library by supplying a crafted input containing the 4-byte sequence `0F 0F <modrm> <imm8>`. Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:21 Jul, 2026 | 20:10
Updated At:22 Jul, 2026 | 13:42
Rejected At:
â–¼CVE Numbering Authority (CNA)
Capstone has a NULL Pointer Dereference with 3DNow! opcodes

Capstone is a disassembly framework. Versions prior to 6.0.0-Alpha8 and 5.0.8 have a NULL pointer dereference in `modRMRequired()` and `decode()` when disassembling 3DNow! opcodes (`0F 0F`) in builds compiled with `-DCAPSTONE_X86_REDUCE`, allowing a remote attacker to crash any application using the reduced X86 Capstone library by supplying a crafted input containing the 4-byte sequence `0F 0F <modrm> <imm8>`. Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.

Affected Products
Vendor
capstone-engine
Product
capstone
Versions
Affected
  • < 5.0.8
  • < 6.0.0-Alpha8
Problem Types
TypeCWE IDDescription
CWECWE-476CWE-476: NULL Pointer Dereference
Type: CWE
CWE ID: CWE-476
Description: CWE-476: NULL Pointer Dereference
Metrics
VersionBase scoreBase severityVector
3.15.1MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Version: 3.1
Base score: 5.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
x_refsource_CONFIRM
https://github.com/capstone-engine/capstone/pull/2924
x_refsource_MISC
https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f
x_refsource_MISC
https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7
x_refsource_MISC
Hyperlink: https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/capstone-engine/capstone/pull/2924
Resource:
x_refsource_MISC
Hyperlink: https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f
Resource:
x_refsource_MISC
Hyperlink: https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7
Resource:
x_refsource_MISC
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
exploit
Hyperlink: https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
Resource:
exploit
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:21 Jul, 2026 | 21:16
Updated At:30 Jul, 2026 | 15:16

Capstone is a disassembly framework. Versions prior to 6.0.0-Alpha8 and 5.0.8 have a NULL pointer dereference in `modRMRequired()` and `decode()` when disassembling 3DNow! opcodes (`0F 0F`) in builds compiled with `-DCAPSTONE_X86_REDUCE`, allowing a remote attacker to crash any application using the reduced X86 Capstone library by supplying a crafted input containing the 4-byte sequence `0F 0F <modrm> <imm8>`. Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.1MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary3.15.9MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A
Type: Secondary
Version: 3.1
Base score: 5.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Primary
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
capstone-engine
capstone-engine
>>capstone>>Versions before 5.0.8(exclusive)
cpe:2.3:a:capstone-engine:capstone:*:*:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha1:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha2:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha3:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha4:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha5:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha6:*:*:*:*:*:*
capstone-engine
capstone-engine
>>capstone>>6.0.0
cpe:2.3:a:capstone-engine:capstone:6.0.0:alpha7:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-476Secondarysecurity-advisories@github.com
CWE ID: CWE-476
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1fsecurity-advisories@github.com
Patch
https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7security-advisories@github.com
Patch
https://github.com/capstone-engine/capstone/pull/2924security-advisories@github.com
Issue Tracking
Patch
https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrmsecurity-advisories@github.com
Exploit
Vendor Advisory
https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Hyperlink: https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/capstone-engine/capstone/pull/2924
Source: security-advisories@github.com
Resource:
Issue Tracking
Patch
Hyperlink: https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory

Change History

0
Information is not available yet

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