{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-109588 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-109588 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-109588 is a critical vulnerability in FreeRTOS-Kernel, published on 16 Oct 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-2026-109588 and fix it if it is affected.\n\nWhat it is: CVE-2026-109588 is a critical vulnerability in FreeRTOS-Kernel, published on 16 Oct 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-2026-109588 in the wild and no public exploit code.\n\nAffected product: FreeRTOS-Kernel. 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-2026-109588/ (Markdown: https://insights.sbomify.com/CVE-2026-109588/index.md)","id":"CVE-2026-109588","markdown":"https://insights.sbomify.com/CVE-2026-109588/index.md","name":"CVE-2026-109588","record":{"aliases":["GHSA-qf4j-6f5j-876g"],"analysis":{"component_type":"operating_system","fix_type":"upgrade","impacts":["privilege_escalation","data_read","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"FreeRTOS kernel","requires_auth":"low_privilege","summary":"An integer truncation flaw in FreeRTOS allows unprivileged tasks to access privileged kernel memory via stream buffer calls on specific Arm Cortex-R82 MPU builds.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"AMZN","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-197","name":"Numeric Truncation Error"},{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"Numeric truncation of the buffer length in the MPU buffer authorization check in FreeRTOS-Kernel V11.3.0 and V11.3.1 on the Arm Cortex-R82 (Armv8-R AArch64) MPU port might allow, under certain conditions, an unprivileged task on MPU-enabled builds to read or write privileged kernel memory beyond the validated buffer window, via a stream buffer system call.\n\nTo remediate this issue, users should upgrade to version V11.3.2 or later.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel","id":"CVE-2026-109588","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"The Tour Booking Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'width', 'height' and 'zoom' shortcode at","id":"CVE-2026-109590"},"packages":[],"prev":{"headline":"Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel","id":"CVE-2026-109587"},"products":["FreeRTOS-Kernel"],"published":"2026-10-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-10-20","vendors":["FreeRTOS"]},"summary":"An integer truncation flaw in FreeRTOS allows unprivileged tasks to access privileged kernel memory via stream buffer calls on specific Arm Cortex-R82 MPU builds.","url":"https://insights.sbomify.com/CVE-2026-109588/"}