Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
A null pointer dereference vulnerability (CVE-2026-47143) was found in the Capstone disassembly framework affecting builds compiled with the -DCAPSTONE_X86_REDUCE flag. This flaw can cause applications using the reduced X86 Capstone library to crash when processing specially crafted 3DNow! opcode inputs, resulting in a denial of service (DoS). The vulnerability affects specific Red Hat Hardened Images RPM packages of Capstone version 5.0.8-0.1.hum1. Red Hat has issued an update to address this issue.
AI Analysis
Technical Summary
CVE-2026-47143 is a null pointer dereference vulnerability in the Capstone disassembly framework's reduced X86 build (-DCAPSTONE_X86_REDUCE). The flaw occurs in the modRMRequired() and decode() functions when disassembling 3DNow! opcodes containing a specific 4-byte sequence. Exploitation leads to application crashes (denial of service) for any software using the affected Capstone library. Standard full builds of Capstone are not vulnerable. Red Hat released updated RPM packages (capstone-5.0.8-0.1.hum1 and related) for their Hardened Images to fix this issue.
Potential Impact
The vulnerability allows a remote attacker to cause denial of service by crashing applications that use the reduced X86 Capstone library during disassembly of crafted 3DNow! opcode inputs. There is no impact on confidentiality or integrity. The flaw is limited to builds compiled with the -DCAPSTONE_X86_REDUCE flag. No known exploits are reported in the wild.
Mitigation Recommendations
Red Hat has released updated Capstone RPM packages (version 5.0.8-0.1.hum1) for Hardened Images that fix this vulnerability. Users should apply these updates to affected packages to remediate the issue. No additional mitigations are specified or required beyond applying the official update.
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Description
A null pointer dereference vulnerability (CVE-2026-47143) was found in the Capstone disassembly framework affecting builds compiled with the -DCAPSTONE_X86_REDUCE flag. This flaw can cause applications using the reduced X86 Capstone library to crash when processing specially crafted 3DNow! opcode inputs, resulting in a denial of service (DoS). The vulnerability affects specific Red Hat Hardened Images RPM packages of Capstone version 5.0.8-0.1.hum1. Red Hat has issued an update to address this issue.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-47143 is a null pointer dereference vulnerability in the Capstone disassembly framework's reduced X86 build (-DCAPSTONE_X86_REDUCE). The flaw occurs in the modRMRequired() and decode() functions when disassembling 3DNow! opcodes containing a specific 4-byte sequence. Exploitation leads to application crashes (denial of service) for any software using the affected Capstone library. Standard full builds of Capstone are not vulnerable. Red Hat released updated RPM packages (capstone-5.0.8-0.1.hum1 and related) for their Hardened Images to fix this issue.
Potential Impact
The vulnerability allows a remote attacker to cause denial of service by crashing applications that use the reduced X86 Capstone library during disassembly of crafted 3DNow! opcode inputs. There is no impact on confidentiality or integrity. The flaw is limited to builds compiled with the -DCAPSTONE_X86_REDUCE flag. No known exploits are reported in the wild.
Mitigation Recommendations
Red Hat has released updated Capstone RPM packages (version 5.0.8-0.1.hum1) for Hardened Images that fix this vulnerability. Users should apply these updates to affected packages to remediate the issue. No additional mitigations are specified or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:43841
- Cve Count
- 1
- State
- PUBLISHED
Threat ID: 6a6fb62abf32cb7a346e6bae
Added to database: 08/02/2026, 21:27:06 UTC
Last enriched: 09/13/2026, 15:18:58 UTC
Last updated: 09/13/2026, 22:01:34 UTC
Views: 43
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.