{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-3679 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-3679 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 5 Aug 2021. 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-2021-3679 and fix it if it is affected.\n\nWhat it is: CVE-2021-3679 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 5 Aug 2021. 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-2021-3679 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. 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-2021-3679/ (Markdown: https://insights.sbomify.com/CVE-2021-3679/index.md)","id":"CVE-2021-3679","markdown":"https://insights.sbomify.com/CVE-2021-3679/index.md","name":"CVE-2021-3679","record":{"aliases":["AZL-6577","DEBIAN-CVE-2021-3679","GHSA-mfgx-frfq-59jc","UBUNTU-CVE-2021-3679"],"analysis":{"component_type":"kernel","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"Privileged local users can cause a denial of service by exhausting CPU resources in the Linux kernel tracing module.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"},{"product":"enterprise_linux","vendor":"redhat"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-07-20","github_poc":1,"max_poc_stars":9,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-07-20T07:42:25Z","kind":"github_poc","ref":"https://github.com/aegistudio/RingBufferDetonator","stars":9,"title":"Exploitation for CVE-2021-3679 and document for its fix"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Denial of service in kernel","id":"CVE-2021-3679","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel","redhat:enterprise_linux"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":5,"next":{"headline":"Missing Cryptographic Step in star7th/showdoc","id":"CVE-2021-3680"},"packages":[],"prev":{"headline":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in star7th/showdoc","id":"CVE-2021-3678"},"products":["kernel"],"published":"2021-08-05","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Privileged local users can cause a denial of service by exhausting CPU resources in the Linux kernel tracing module.","url":"https://insights.sbomify.com/CVE-2021-3679/"}