{"answers":{"affected":"It affects 26 products.","exploited":"There is no known exploitation of CVE-2026-16661 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-16661 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-16661 is a high-severity vulnerability in IBM PowerVM Hypervisor, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-16661 and fix it if it is affected.\n\nWhat it is: CVE-2026-16661 is a high-severity vulnerability in IBM PowerVM Hypervisor, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-16661 in the wild and no public exploit code.\n\nAffected product: IBM PowerVM Hypervisor. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-16661/ (Markdown: https://insights.sbomify.com/CVE-2026-16661/index.md)","id":"CVE-2026-16661","markdown":"https://insights.sbomify.com/CVE-2026-16661/index.md","name":"CVE-2026-16661","record":{"aliases":["GHSA-xx9m-vc9m-c7wp"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"IBM PowerVM Hypervisor","requires_auth":"high_privilege","summary":"An attacker with authenticated service-level access can exploit an integer overflow in the service processor mailbox to execute arbitrary code in the host firmware.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"ibm","cpe":[{"product":"power_system_e1050_\\(9043-mrx\\)_firmware","vendor":"ibm"},{"product":"power_system_e1080_\\(9080-hex\\)_firmware","vendor":"ibm"},{"product":"power_system_e1150_\\(9043-mru\\)_firmware","vendor":"ibm"},{"product":"power_system_e1180_\\(9080-heu\\)_firmware","vendor":"ibm"},{"product":"power_system_e950_\\(9040-mr9\\)_firmware","vendor":"ibm"},{"product":"power_system_e980_\\(9080-m9s\\)_firmware","vendor":"ibm"},{"product":"power_system_h922_\\(9223-22s\\)_firmware","vendor":"ibm"},{"product":"power_system_h924_\\(9223-42s\\)_firmware","vendor":"ibm"},{"product":"power_system_l1022_\\(9786-22h\\)_firmware","vendor":"ibm"},{"product":"power_system_l1024_\\(9786-42h\\)_firmware","vendor":"ibm"},{"product":"power_system_l1122_\\(9856-22h\\)_firmware","vendor":"ibm"},{"product":"power_system_l1124_\\(9856-42h\\)_firmware","vendor":"ibm"},{"product":"power_system_s1012_\\(9028-21b\\)_firmware","vendor":"ibm"},{"product":"power_system_s1014_\\(9105-41b\\)_firmware","vendor":"ibm"},{"product":"power_system_s1022_\\(9105-22a\\)_firmware","vendor":"ibm"},{"product":"power_system_s1022s_\\(9105-22b\\)_firmware","vendor":"ibm"},{"product":"power_system_s1024_\\(9105-42a\\)_firmware","vendor":"ibm"},{"product":"power_system_s1112_\\(9242-21b\\)_firmware","vendor":"ibm"},{"product":"power_system_s1112_\\(9242-21t\\)_firmware","vendor":"ibm"},{"product":"power_system_s1114_\\(9824-41b\\)_firmware","vendor":"ibm"},{"product":"power_system_s1122_\\(9824-22a\\)_firmware","vendor":"ibm"},{"product":"power_system_s1122s_\\(9824-22b\\)_firmware","vendor":"ibm"},{"product":"power_system_s1124_\\(9824-42a\\)_firmware","vendor":"ibm"},{"product":"power_system_s914_\\(9009-41g\\)_firmware","vendor":"ibm"},{"product":"power_system_s922_\\(9009-22g\\)_firmware","vendor":"ibm"},{"product":"power_system_s924_\\(9009-42g\\)_firmware","vendor":"ibm"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the service processor mailbox interface. An attacker with authenticated service-level access to the FSP can exploit this vulnerability, allowing arbitrary code to be executed in the host firmware runtime, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact to the managed system.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Power System Integer Overflow","id":"CVE-2026-16661","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"DataStage on Cloud Pak for Data has several vulnerabilities","id":"CVE-2026-16672"},"packages":[],"prev":{"headline":"IBM Db2 Mirror for i is affected by multiple vulnerabilities [, , ]","id":"CVE-2026-16660"},"products":["PowerVM Hypervisor"],"published":"2026-08-19","related":[{"cvss_score":8.4,"headline":"Power System Integer Overflow","id":"CVE-2026-17091","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.4,"headline":"Power System update in Buffer Copy","id":"CVE-2026-11885","kev_date_added":null,"published":"2026-07-30"},{"cvss_score":8.2,"headline":"Power System Out-of-bounds Read","id":"CVE-2026-16707","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.2,"headline":"Power System Missing Authorization","id":"CVE-2026-16930","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.2,"headline":"Power System Buffer Overflow","id":"CVE-2026-19234","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.1,"headline":"Power System Improper Input Validation","id":"CVE-2026-17414","kev_date_added":null,"published":"2026-08-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-22","vendors":["IBM"]},"summary":"An attacker with authenticated service-level access can exploit an integer overflow in the service processor mailbox to execute arbitrary code in the host firmware.","url":"https://insights.sbomify.com/CVE-2026-16661/"}