{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27433 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27433 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27433 is a high-severity vulnerability in ARM mbed-ualloc memory library, published on 3 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-27433 and fix it if it is affected.\n\nWhat it is: CVE-2021-27433 is a high-severity vulnerability in ARM mbed-ualloc memory library, published on 3 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-27433 in the wild and no public exploit code.\n\nAffected product: ARM mbed-ualloc memory library. 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-2021-27433/ (Markdown: https://insights.sbomify.com/CVE-2021-27433/index.md)","id":"CVE-2021-27433","markdown":"https://insights.sbomify.com/CVE-2021-27433/index.md","name":"CVE-2021-27433","record":{"aliases":["GHSA-5r3j-39g2-55xr"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"ARM mbed-ualloc library","requires_auth":"none","summary":"An integer overflow in the ARM mbed-ualloc library allows attackers to trigger arbitrary memory allocation, potentially leading to remote code execution or crashes.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"mbed_ualloc","vendor":"arm"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbed_krbs, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.","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":"ARM mbed-ualloc memory library Integer Overflow or Wraparound","id":"CVE-2021-27433","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":"Denial of service in OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5","id":"CVE-2021-27434"},"packages":[],"prev":{"headline":"Denial of service in OPC Foundation OPC UA .NET Standard and OPC UA .NET Legacy","id":"CVE-2021-27432"},"products":["mbed-ualloc memory library"],"published":"2022-05-03","related":[],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-16","vendors":["ARM"]},"summary":"An integer overflow in the ARM mbed-ualloc library allows attackers to trigger arbitrary memory allocation, potentially leading to remote code execution or crashes.","url":"https://insights.sbomify.com/CVE-2021-27433/"}