{"affected":[{"product":"Qiskit SDK","source":"CNA: ibm","vendor":"IBM","versions":[{"lessThanOrEqual":"2.6.1","status":"affected","version":"2.4.0","versionType":"semver"}]}],"cveId":"CVE-2026-116501","cwes":["CWE-787"],"description":"IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to execute arbitrary code due to an out-of-bounds write caused by improper input validation when accessing a corrupted unitary matrix.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.4,"severity":"high","source":"CNA: ibm","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},{"score":8.4,"severity":"high","source":"NVD: psirt@us.ibm.com","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794158197250,"publishedAt":1794157518090,"references":[{"source":"CNA: ibm","tags":["vendor-advisory","patch"],"url":"https://www.ibm.com/support/pages/node/7295237"},{"source":"psirt@us.ibm.com","tags":[],"url":"https://www.ibm.com/support/pages/node/7295237"}],"remediation":[{"kind":"fix","source":"CNA: ibm","text":"Remediation/Fixes guidance:\n\n\n\nThe issue is addressed in Qiskit versions v2.6.2. This version is patched to detect this situation and write out a sentinel value to identify the instruction is in an inconsistent state.\n\n\n\n\n\nProduct(s)Version(s) number and/or range Remediation/Fix/Instructions< Qiskit SDK https://github.com/qiskit/qiskit  - qk_circuit_inst_unitary() function>v2.6.2\n\nUpgrade to the patched versions: qiskit v2.6.2."},{"kind":"workaround","source":"CNA: ibm","text":"Workarounds/Mitigation guidance:\n\n\n\n\nNone"},{"kind":"fix","source":"CNA: ibm","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://www.ibm.com/support/pages/node/7295237"}],"revision":"c9646160022cb327217729900c995afdea05064568fdf2302a7c36d58df3d9e2","sources":[{"modifiedAt":1794157518090,"name":"CNA: ibm","retrievedAt":1794161313141,"url":"https://www.cve.org/CVERecord?id=CVE-2026-116501"},{"modifiedAt":1794158197250,"name":"NVD","retrievedAt":1794161787428,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116501"}],"ssvc":null,"status":"published","title":"Qiskit SDK C API may trigger an out of bounds write on accessing the unitary matrix with qk_circuit_inst_unitary().","updatedAt":1794161787428}