{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-22556 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-22556 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-22556 is a medium-severity vulnerability in Google LLC Fuchsia Kernel, published on 3 May 2022. 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-2021-22556 and fix it if it is affected.\n\nWhat it is: CVE-2021-22556 is a medium-severity vulnerability in Google LLC Fuchsia Kernel, published on 3 May 2022. 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-2021-22556 in the wild and no public exploit code.\n\nAffected product: Google LLC Fuchsia 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-2021-22556/ (Markdown: https://insights.sbomify.com/CVE-2021-22556/index.md)","id":"CVE-2021-22556","markdown":"https://insights.sbomify.com/CVE-2021-22556/index.md","name":"CVE-2021-22556","record":{"aliases":["GHSA-cgfp-g9xr-gj33"],"analysis":{"component_type":"kernel","fix_type":"upgrade","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Fuchsia Kernel","requires_auth":"low_privilege","summary":"An integer overflow in the Fuchsia kernel allows attackers with code execution to control kernel memory, enabling privilege escalation.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Google","cpe":[{"product":"fuchsia","vendor":"google"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don’t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond.","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":"Integer Overflow in Fuchsia Kernel","id":"CVE-2021-22556","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Code execution in SLO Generator via YAML Payload","id":"CVE-2021-22557"},"packages":[],"prev":{"headline":"Linux Kernel Heap Out-of-Bounds Write","id":"CVE-2021-22555"},"products":["Fuchsia Kernel"],"published":"2022-05-03","related":[{"cvss_score":7.5,"headline":"Write access to VMO data through copy-on-write in Fuchsia","id":"CVE-2022-0247","kev_date_added":null,"published":"2022-02-25"},{"cvss_score":6.9,"headline":"Identifiable Header Values In Fuchsia Leading To Tracking of The User","id":"CVE-2024-10604","kev_date_added":null,"published":"2025-01-30"},{"cvss_score":5.3,"headline":"Illegal access to Kernel log in Fuchsia","id":"CVE-2022-0882","kev_date_added":null,"published":"2022-05-03"},{"cvss_score":5.1,"headline":"Incorrect mapping of Executable bits in Fuchsia Kernel","id":"CVE-2021-22566","kev_date_added":null,"published":"2022-01-18"}],"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":"2025-04-21","vendors":["Google LLC"]},"summary":"An integer overflow in the Fuchsia kernel allows attackers with code execution to control kernel memory, enabling privilege escalation.","url":"https://insights.sbomify.com/CVE-2021-22556/"}