{"answers":{"affected":"It affects 19 products.","exploited":"There is no known exploitation of CVE-2026-18871 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-18871 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18871 is a high-severity memory corruption 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-2026-18871 and fix it if it is affected.\n\nWhat it is: CVE-2026-18871 is a high-severity memory corruption 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-2026-18871 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-2026-18871/ (Markdown: https://insights.sbomify.com/CVE-2026-18871/index.md)","id":"CVE-2026-18871","markdown":"https://insights.sbomify.com/CVE-2026-18871/index.md","name":"CVE-2026-18871","record":{"aliases":["GHSA-28wc-xwjr-q8gm"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["denial_of_service","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"IBM PowerVM Hypervisor","requires_auth":"low_privilege","summary":"An attacker with service-level access can cause memory corruption and system crashes via crafted firmware configuration data.","user_interaction":"not_required","vuln_class":"memory_corruption"},"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_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"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an 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 Buffer Overflow","id":"CVE-2026-18871","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"IBM Financial Transaction Manager (FTM) is Impacted by Multiple Vulnerabilities","id":"CVE-2026-18872"},"packages":[],"prev":{"headline":"This Power System update is being released to address","id":"CVE-2026-18870"},"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 Integer Overflow","id":"CVE-2026-16661","kev_date_added":null,"published":"2026-08-19"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-08-20","vendors":["IBM"]},"summary":"An attacker with service-level access can cause memory corruption and system crashes via crafted firmware configuration data.","url":"https://insights.sbomify.com/CVE-2026-18871/"}