Advisory severityMedium5.9Red Hat Linux

Medium [CVE-2026-47143] Denial of Service vulnerability via crafted input

This medium-severity Red Hat Linux advisory covers CVE-2026-47143 affecting Red Hat Hardened Images.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-47143 Source published Jul 21, 2026Source updated Jul 21, 2026

VulniPulse record published Jul 28, 2026Record updated Aug 11, 2026

CVE-2026-47143

Affected products & platforms

Red Hat LinuxUnclassified

Open source advisory

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Summary

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 `.

This vulnerability only affects builds compiled with the -DCAPSTONE_X86_REDUCE flag; standard full builds are not vulnerable. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-476. Affected Red Hat products: Red Hat Hardened Images.

Red Hat fixing advisory: RHSA-2026:43841.

Affected versions

< 6.0.0-Alpha8
< 5.0.8
6.0.0

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Fixed versions

capstone-main-5.0.8-0.1.hum1
RHSA-2026:43841

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Mitigation

Upgrade to a fixed release: capstone-main-5.0.8-0.1.hum1, RHSA-2026:43841. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 12 days ago·verify at source

Discussion(0)

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