PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-11829 IBM CVE debrief

IBM MQ Buffer Overflow Vulnerability: IBM MQ is susceptible to a buffer overflow vulnerability due to improper validation of offset values in MQOPEN requests. This vulnerability could allow an authenticated attacker to cause a denial of service, potentially disrupting service availability. Defenders responsible for IBM MQ deployments should assess exposure and apply patches, including administrators and security teams managing MQ Operator and MQ Advanced container images. The vulnerability affects various versions of MQ Operator and MQ Advanced container images.

Vendor
IBM
Product
MQ Operator
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-19
Original CVE updated
2026-10-19
Advisory published
2026-10-19
Advisory updated
2026-10-19

Who should care

Defenders responsible for IBM MQ deployments should assess exposure and apply patches. This includes administrators and security teams managing MQ Operator and MQ Advanced container images.

Why it matters

The CVE-2026-11829 buffer overflow vulnerability in IBM MQ requires defenders to assess exposure, apply patches, and monitor for potential denial of service attacks. This vulnerability affects multiple versions of MQ Operator and MQ Advanced container images.

  • Denial of service attacks may occur if offset values in MQOPEN requests are not properly validated
  • Authenticated attackers may exploit this vulnerability to impact service availability
  • Defenders should prioritize patching affected versions to prevent potential service disruptions
  • Verification of inventory and exposure is necessary to ensure the security of IBM MQ deployments

Technical summary

IBM MQ could allow an authenticated attacker to cause a denial of service due to improper validation of offset values in MQOPEN requests. The vulnerability affects various versions of MQ Operator and MQ Advanced container images, requiring defenders to assess exposure, apply patches, and monitor for potential denial of service attacks. Affected product deployments should be reviewed for exposure, and patches from IBM should be applied to prevent potential service disruptions.

Defensive priority

Medium

Recommended defensive actions

  • Review and apply patches from IBM for affected MQ Operator and MQ Advanced container images versions
  • Inventory and assess exposure of MQ Operator and MQ Advanced container images in your environment
  • Monitor for potential denial of service attacks targeting IBM MQ

Evidence notes

The CVE record and source item provide details on the buffer overflow vulnerability in IBM MQ. The vulnerability could allow an authenticated attacker to cause a denial of service due to improper validation of offset values in MQOPEN requests.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11829 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11829

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

  • CVE-2026-11829 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11829

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

Supplemental references

  • IBM MQ Buffer Overflow

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/11xxx/CVE-2026-11829.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://www.ibm.com/support/pages/node/7292667

    Supplemental source - vendor-advisory, patch

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.