{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27439 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27439 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27439 is a high-severity vulnerability in TencentOS-tiny, 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-2021-27439 and fix it if it is affected.\n\nWhat it is: CVE-2021-27439 is a high-severity vulnerability in TencentOS-tiny, 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-2021-27439 in the wild and no public exploit code.\n\nAffected product: TencentOS-tiny. 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-2021-27439/ (Markdown: https://insights.sbomify.com/CVE-2021-27439/index.md)","id":"CVE-2021-27439","markdown":"https://insights.sbomify.com/CVE-2021-27439/index.md","name":"CVE-2021-27439","record":{"aliases":["GHSA-q338-m4f4-2mm6"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"TencentOS-tiny","requires_auth":"none","summary":"An integer overflow in TencentOS-tiny's memory allocator allows attackers to cause crashes or execute arbitrary code.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"tencentos-tiny","vendor":"tencent"}],"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":"TencentOS-tiny version 3.1.0 is vulnerable to integer wrap-around in function 'tos_mmheap_alloc incorrect calculation of effective memory allocation size. This improper memory assignment 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":null,"headline":"TencentOS-tiny Integer Overflow or Wraparound","id":"CVE-2021-27439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Hardcoded credentials in Reason DR60","id":"CVE-2021-27440"},"packages":[],"prev":{"headline":"Hardcoded credentials in Reason DR60","id":"CVE-2021-27438"},"products":["TencentOS-tiny"],"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":["TencentOS-tiny"]},"summary":"An integer overflow in TencentOS-tiny's memory allocator allows attackers to cause crashes or execute arbitrary code.","url":"https://insights.sbomify.com/CVE-2021-27439/"}