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PatchSiren cyber security CVE debrief

CVE-2026-6794 IBM CVE debrief

IBM Concert 1.0.0 through 3.0.0 has a double free vulnerability due to incorrect memory management. A local attacker can exploit this flaw to corrupt heap memory and potentially execute arbitrary code. This vulnerability exists in IBM Concert systems, particularly affecting versions 1.0.0 through 3.0.0. The double free vulnerability allows for potential memory corruption and instability. Defenders should assess exposure and prioritize patching or mitigation, especially in systems where local attackers may have access. The CVE record and NVD entry provide details on the vulnerability.

Vendor
IBM
Product
Concert
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-23
Original CVE updated
2026-09-28
Advisory published
2026-09-23
Advisory updated
2026-09-28

Who should care

Defenders responsible for IBM Concert systems, especially those with local access, should assess exposure and prioritize patching or mitigation.

Why it matters

CVE-2026-6794 is a high-severity double free vulnerability in IBM Concert that could allow local attackers to execute arbitrary code. Defenders should prioritize patching, implement compensating controls, and monitor systems for suspicious activity.

  • Potential for local attackers to execute arbitrary code.
  • Memory corruption and instability in affected systems.
  • Need for patching or upgrading to a non-vulnerable version.
  • Verification of system integrity and monitoring for suspicious activity.

Technical summary

IBM Concert 1.0.0 through 3.0.0 has a double free vulnerability that exists due to incorrect memory management. A local attacker can exploit this to corrupt heap memory and potentially execute arbitrary code. The vulnerability is a result of improper memory handling in the affected IBM Concert versions. This could lead to memory corruption, system instability, and potentially allow local attackers to execute arbitrary code. Defenders should prioritize patching or mitigating this vulnerability.

Defensive priority

Defenders should prioritize patching or mitigating this vulnerability, especially in systems where local attackers may have access.

Recommended defensive actions

  • Patch or upgrade IBM Concert to a version outside the vulnerable range (1.0.0 to 3.0.0).
  • Implement compensating controls to restrict local access to the affected systems.
  • Monitor systems for suspicious activity related to memory corruption.

Evidence notes

The CVE record and NVD entry provide details on the double free vulnerability in IBM Concert. However, additional information on exploitation or impact is limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-6794 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-6794

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-6794 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-6794

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.