{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-3348 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-3348 is a high-severity use after free vulnerability in Debian Debian Linux, published on 1 Feb 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-2021-3348 and fix it if it is affected.\n\nWhat it is: CVE-2021-3348 is a high-severity use after free vulnerability in Debian Debian Linux, published on 1 Feb 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-2021-3348 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-2021-3348/ (Markdown: https://insights.sbomify.com/CVE-2021-3348/index.md)","id":"CVE-2021-3348","markdown":"https://insights.sbomify.com/CVE-2021-3348/index.md","name":"CVE-2021-3348","record":{"aliases":["CVE-2021-20207","DEBIAN-CVE-2021-3348","GHSA-7hqh-xccf-8jp4","SUSE-SU-2021:0739-1","SUSE-SU-2021:0742-1","UBUNTU-CVE-2021-3348"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"Local attackers with nbd device access can trigger a use-after-free in the Linux kernel, potentially leading to code execution or privilege escalation.","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":"linux_kernel","vendor":"linux"}],"cvss":{"score":7,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71.","ecosystems":["SUSE:Linux Enterprise High Availability Extension 12 SP5","SUSE:Linux Enterprise Live Patching 12 SP5","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Software Development Kit 12 SP5","SUSE:Linux Enterprise Workstation Extension 12 SP5"],"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-2021-3348","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"use_after_free","year":"2021"},"n_packages":18,"n_references":4,"next":{"headline":"Security feature bypass in n/a","id":"CVE-2021-3349"},"packages":[{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-default","purl":"pkg:rpm/suse/kernel-default\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Live Patching 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-default","purl":"pkg:rpm/suse/kernel-default\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Live Patching 12 SP5","fixed":["1-8.3.1"],"introduced":["0"],"last_affected":[],"package":"kgraft-patch-SLE12-SP5_Update_16","purl":"pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_16\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.12.14-16.47.1"],"introduced":["0"],"last_affected":[],"package":"kernel-azure","purl":"pkg:rpm/suse/kernel-azure\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0739-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-default","purl":"pkg:rpm/suse/kernel-default\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-source","purl":"pkg:rpm/suse/kernel-source\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.12.14-16.47.1"],"introduced":["0"],"last_affected":[],"package":"kernel-source-azure","purl":"pkg:rpm/suse/kernel-source-azure\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0739-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-syms","purl":"pkg:rpm/suse/kernel-syms\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.12.14-16.47.1"],"introduced":["0"],"last_affected":[],"package":"kernel-syms-azure","purl":"pkg:rpm/suse/kernel-syms-azure\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0739-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.12.14-16.47.1"],"introduced":["0"],"last_affected":[],"package":"kernel-azure","purl":"pkg:rpm/suse/kernel-azure\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0739-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-default","purl":"pkg:rpm/suse/kernel-default\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-source","purl":"pkg:rpm/suse/kernel-source\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.12.14-16.47.1"],"introduced":["0"],"last_affected":[],"package":"kernel-source-azure","purl":"pkg:rpm/suse/kernel-source-azure\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0739-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-syms","purl":"pkg:rpm/suse/kernel-syms\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.12.14-16.47.1"],"introduced":["0"],"last_affected":[],"package":"kernel-syms-azure","purl":"pkg:rpm/suse/kernel-syms-azure\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0739-1"},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-docs","purl":"pkg:rpm/suse/kernel-docs\u0026distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-obs-build","purl":"pkg:rpm/suse/kernel-obs-build\u0026distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5","source":"SUSE-SU-2021:0742-1"},{"ecosystem":"SUSE:Linux Enterprise Workstation Extension 12 SP5","fixed":["4.12.14-122.63.1"],"introduced":["0"],"last_affected":[],"package":"kernel-default","purl":"pkg:rpm/suse/kernel-default\u0026distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5","source":"SUSE-SU-2021:0742-1"}],"prev":{"headline":"Use after free in n/a","id":"CVE-2021-3347"},"products":["n/a"],"published":"2021-02-01","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":"2024-08-03","vendors":["n/a"]},"summary":"Local attackers with nbd device access can trigger a use-after-free in the Linux kernel, potentially leading to code execution or privilege escalation.","url":"https://insights.sbomify.com/CVE-2021-3348/"}