Vulnerability-Lookup

RHSA-2026:43841

Vulnerability from csaf_redhat - Published: 2026-07-22 19:22 - Updated: 2026-07-28 03:45

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: capstone: * capstone-5.0.8-0.1.hum1 (aarch64, x86_64) * capstone-devel-5.0.8-0.1.hum1 (aarch64, x86_64) * capstone-java-5.0.8-0.1.hum1 (noarch) * capstone-static-5.0.8-0.1.hum1 (aarch64, x86_64) * python3-capstone-5.0.8-0.1.hum1 (noarch) * capstone-5.0.8-0.1.hum1.src (src) Security Fix(es): capstone: * CVE-2026-47143

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-47143

A flaw was found in the Capstone disassembly framework. This vulnerability, a null pointer dereference, can be exploited by a remote attacker. By providing a specially crafted input containing a specific 4-byte sequence during the disassembly of 3DNow! opcodes, the attacker can cause any application using the reduced X86 Capstone library to crash, leading to a denial of service (DoS).

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-476 - NULL Pointer Dereference

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:capstone-main@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:capstone-main@noarch	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:capstone-main@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:capstone-main@x86_64	—	Vendor Fix fix

Threats

Impact Moderate

References

13 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:43841	self
https://access.redhat.com/security/cve/CVE-2026-47143	external
https://access.redhat.com/security/updates/classi…	external
https://images.redhat.com/	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-47143	self
https://bugzilla.redhat.com/show_bug.cgi?id=2504488	external
https://www.cve.org/CVERecord?id=CVE-2026-47143	external
https://nvd.nist.gov/vuln/detail/CVE-2026-47143	external
https://github.com/capstone-engine/capstone/commi…	external
https://github.com/capstone-engine/capstone/commi…	external
https://github.com/capstone-engine/capstone/pull/2924	external
https://github.com/capstone-engine/capstone/secur…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update for Red Hat Hardened Images RPMs is now available.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "This update includes the following RPMs:\n\ncapstone:\n  * capstone-5.0.8-0.1.hum1 (aarch64, x86_64)\n  * capstone-devel-5.0.8-0.1.hum1 (aarch64, x86_64)\n  * capstone-java-5.0.8-0.1.hum1 (noarch)\n  * capstone-static-5.0.8-0.1.hum1 (aarch64, x86_64)\n  * python3-capstone-5.0.8-0.1.hum1 (noarch)\n  * capstone-5.0.8-0.1.hum1.src (src)\n\nSecurity Fix(es):\n\ncapstone:\n  * CVE-2026-47143",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:43841",
        "url": "https://access.redhat.com/errata/RHSA-2026:43841"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-47143",
        "url": "https://access.redhat.com/security/cve/CVE-2026-47143"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/",
        "url": "https://access.redhat.com/security/updates/classification/"
      },
      {
        "category": "external",
        "summary": "https://images.redhat.com/",
        "url": "https://images.redhat.com/"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_43841.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update",
    "tracking": {
      "current_release_date": "2026-07-28T03:45:31+00:00",
      "generator": {
        "date": "2026-07-28T03:45:31+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.3.7"
        }
      },
      "id": "RHSA-2026:43841",
      "initial_release_date": "2026-07-22T19:22:02+00:00",
      "revision_history": [
        {
          "date": "2026-07-22T19:22:02+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-07-25T05:39:32+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-07-28T03:45:31+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Hardened Images",
                "product": {
                  "name": "Red Hat Hardened Images",
                  "product_id": "Red Hat Hardened Images",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:hummingbird:1"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Hardened Images"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "capstone-main@aarch64",
                "product": {
                  "name": "capstone-main@aarch64",
                  "product_id": "capstone-main@aarch64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/capstone@5.0.8-0.1.hum1?arch=aarch64\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-aarch64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "aarch64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "capstone-main@src",
                "product": {
                  "name": "capstone-main@src",
                  "product_id": "capstone-main@src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/capstone@5.0.8-0.1.hum1?arch=src\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-source-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "capstone-main@x86_64",
                "product": {
                  "name": "capstone-main@x86_64",
                  "product_id": "capstone-main@x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/capstone@5.0.8-0.1.hum1?arch=x86_64\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-x86_64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "capstone-main@noarch",
                "product": {
                  "name": "capstone-main@noarch",
                  "product_id": "capstone-main@noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/capstone-java@5.0.8-0.1.hum1?arch=noarch\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-x86_64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "capstone-main@aarch64 as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:capstone-main@aarch64"
        },
        "product_reference": "capstone-main@aarch64",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "capstone-main@noarch as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:capstone-main@noarch"
        },
        "product_reference": "capstone-main@noarch",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "capstone-main@src as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:capstone-main@src"
        },
        "product_reference": "capstone-main@src",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "capstone-main@x86_64 as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:capstone-main@x86_64"
        },
        "product_reference": "capstone-main@x86_64",
        "relates_to_product_reference": "Red Hat Hardened Images"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-47143",
      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
      },
      "discovery_date": "2026-07-21T21:02:12.153365+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2504488"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Capstone disassembly framework. This vulnerability, a null pointer dereference, can be exploited by a remote attacker. By providing a specially crafted input containing a specific 4-byte sequence during the disassembly of 3DNow! opcodes, the attacker can cause any application using the reduced X86 Capstone library to crash, leading to a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "capstone: Capstone: Denial of Service vulnerability via crafted input",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A flaw was found in the Capstone disassembly framework. A NULL pointer dereference in modRMRequired() and decode() when disassembling 3DNow! opcodes can crash applications using Capstone. This vulnerability only affects builds compiled with the -DCAPSTONE_X86_REDUCE flag; standard full builds are not vulnerable.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Hardened Images:capstone-main@aarch64",
          "Red Hat Hardened Images:capstone-main@noarch",
          "Red Hat Hardened Images:capstone-main@src",
          "Red Hat Hardened Images:capstone-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-47143"
        },
        {
          "category": "external",
          "summary": "RHBZ#2504488",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2504488"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-47143",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-47143"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-47143",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47143"
        },
        {
          "category": "external",
          "summary": "https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f",
          "url": "https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f"
        },
        {
          "category": "external",
          "summary": "https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7",
          "url": "https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7"
        },
        {
          "category": "external",
          "summary": "https://github.com/capstone-engine/capstone/pull/2924",
          "url": "https://github.com/capstone-engine/capstone/pull/2924"
        },
        {
          "category": "external",
          "summary": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm",
          "url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm"
        }
      ],
      "release_date": "2026-07-21T20:10:44.476000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-22T19:22:02+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:capstone-main@aarch64",
            "Red Hat Hardened Images:capstone-main@noarch",
            "Red Hat Hardened Images:capstone-main@src",
            "Red Hat Hardened Images:capstone-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:43841"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:capstone-main@aarch64",
            "Red Hat Hardened Images:capstone-main@noarch",
            "Red Hat Hardened Images:capstone-main@src",
            "Red Hat Hardened Images:capstone-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "capstone: Capstone: Denial of Service vulnerability via crafted input"
    }
  ]
}

CVE-2026-47143 (GCVE-0-2026-47143)

Vulnerability from cvelistv5 – Published: 2026-07-21 20:10 – Updated: 2026-07-22 13:42

Title

Capstone has a NULL Pointer Dereference with 3DNow! opcodes

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 <modrm> <imm8>`. Versions 6.0.0-Alpha8 and 5.0.8 patch the issue.

Severity

5.1 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/capstone-engine/capstone/secur…	x_refsource_CONFIRM
https://github.com/capstone-engine/capstone/pull/2924	x_refsource_MISC
https://github.com/capstone-engine/capstone/commi…	x_refsource_MISC
https://github.com/capstone-engine/capstone/commi…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
capstone-engine	capstone	Affected: < 5.0.8 Affected: < 6.0.0-Alpha8

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-47143",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-22T13:42:44.951327Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-22T13:42:55.326Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "capstone",
          "vendor": "capstone-engine",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.0.8"
            },
            {
              "status": "affected",
              "version": "\u003c 6.0.0-Alpha8"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u003cmodrm\u003e \u003cimm8\u003e`. Versions 6.0.0-Alpha8 and 5.0.8 patch the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-21T20:10:44.476Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/capstone-engine/capstone/security/advisories/GHSA-289w-cm54-fgrm"
        },
        {
          "name": "https://github.com/capstone-engine/capstone/pull/2924",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capstone-engine/capstone/pull/2924"
        },
        {
          "name": "https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capstone-engine/capstone/commit/a0201371719b5aaa91d318ab2898843718f92d1f"
        },
        {
          "name": "https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capstone-engine/capstone/commit/fab595205fee206f5c21be6ed8ad2eaf9225f1c7"
        }
      ],
      "source": {
        "advisory": "GHSA-289w-cm54-fgrm",
        "discovery": "UNKNOWN"
      },
      "title": "Capstone has a NULL Pointer Dereference with 3DNow! opcodes"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47143",
    "datePublished": "2026-07-21T20:10:44.476Z",
    "dateReserved": "2026-05-18T19:50:18.696Z",
    "dateUpdated": "2026-07-22T13:42:55.326Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

RHSA-2026:43841

CVE-2026-47143 (GCVE-0-2026-47143)

Tags

Sightings

Nomenclature