{"answers":{"affected":"It affects 13 products.","exploited":"There is no known exploitation of CVE-2021-33574 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-33574 is a critical use after free vulnerability in Debian Debian Linux, published on 25 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-33574 and fix it if it is affected.\n\nWhat it is: CVE-2021-33574 is a critical use after free vulnerability in Debian Debian Linux, published on 25 May 2021. 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-2021-33574 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-2021-33574/ (Markdown: https://insights.sbomify.com/CVE-2021-33574/index.md)","id":"CVE-2021-33574","markdown":"https://insights.sbomify.com/CVE-2021-33574/index.md","name":"CVE-2021-33574","record":{"aliases":["DEBIAN-CVE-2021-33574","GHSA-rx5m-j84j-22pg","MGASA-2021-0308","OESA-2021-1239","SUSE-SU-2021:3290-1","UBUNTU-CVE-2021-33574"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"GNU C Library","requires_auth":"none","summary":"A use-after-free in glibc's mq_notify function allows attackers to cause application crashes or potentially other impacts via crafted thread attributes.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"glibc","vendor":"gnu"},{"product":"cloud_backup","vendor":"netapp"},{"product":"e-series_santricity_os_controller","vendor":"netapp"},{"product":"h300e_firmware","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500e_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h700e_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"},{"product":"solidfire_baseboard_management_controller_firmware","vendor":"netapp"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.","ecosystems":["SUSE:Linux Enterprise Server 12 SP4-LTSS","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 12 SP4","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Software Development Kit 12 SP5","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 9"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Use after free in n/a","id":"CVE-2021-33574","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","gnu:glibc","netapp:cloud_backup","netapp:e-series_santricity_os_controller","netapp:h300e_firmware","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500e_firmware","netapp:h500s_firmware","netapp:h700e_firmware","netapp:h700s_firmware","netapp:solidfire_baseboard_management_controller_firmware"],"type":"use_after_free","year":"2021"},"n_packages":7,"n_references":7,"next":{"headline":"Remote code execution in ruby-jss","id":"CVE-2021-33575"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Server 12 SP4-LTSS","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS","source":"SUSE-SU-2021:3290-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:3290-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP4","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4","source":"SUSE-SU-2021:3290-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:3290-1"},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP5","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5","source":"SUSE-SU-2021:3290-1"},{"ecosystem":"SUSE:OpenStack Cloud 9","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20OpenStack%20Cloud%209","source":"SUSE-SU-2021:3290-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["2.22-114.15.1"],"introduced":["0"],"last_affected":[],"package":"glibc","purl":"pkg:rpm/suse/glibc\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2021:3290-1"}],"prev":{"headline":"Denial-of-Service (DoS) Vulnerability","id":"CVE-2021-33572"},"products":["n/a"],"published":"2021-05-25","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":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"A use-after-free in glibc's mq_notify function allows attackers to cause application crashes or potentially other impacts via crafted thread attributes.","url":"https://insights.sbomify.com/CVE-2021-33574/"}