{"answers":{"affected":"1 open source package ship an affected version, including Kernel.","exploited":"There is no known exploitation of GSD-2021-1001216 in the wild and no public exploit code.","fix":"No fix has been published for GSD-2021-1001216 yet. Limit exposure of the affected software until one is available.","what":"GSD-2021-1001216 is an use after free vulnerability in Kernel, published on 3 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 GSD-2021-1001216 and fix it if it is affected.\n\nWhat it is: GSD-2021-1001216 is an use after free vulnerability in Kernel, published on 3 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 GSD-2021-1001216 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Kernel (Linux): affected all versions; no fix listed\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/GSD-2021-1001216/ (Markdown: https://insights.sbomify.com/GSD-2021-1001216/index.md)","id":"GSD-2021-1001216","markdown":"https://insights.sbomify.com/GSD-2021-1001216/index.md","name":"GSD-2021-1001216","record":{"aliases":[],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"high_privilege","summary":"A use-after-free vulnerability in the Linux kernel ext4 filesystem allows local attackers with high privileges to cause a denial of service or potentially escalate privileges when remounting MMP-protected filesystems.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"ext4: fix possible UAF when remounting r/o a mmp-protected file system\n\nThis is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.\nThis ID is fixed in Linux Kernel version v5.13.3 by commit 7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd. For more details please see the references link.","ecosystems":["Linux"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"ext4: fix possible UAF when remounting r/o a mmp-protected file system","id":"GSD-2021-1001216","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"Linux","product":null,"products":[],"type":"use_after_free","year":"2021"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"Linux","fixed":[],"introduced":[],"last_affected":[],"package":"Kernel","purl":null,"source":"GSD-2021-1001216"}],"products":null,"published":"2021-08-03","related":[],"sources":[{"class":"open","licence":"CC0 1.0","name":"Global Security Database","prefix":"GSD"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A use-after-free vulnerability in the Linux kernel ext4 filesystem allows local attackers with high privileges to cause a denial of service or potentially escalate privileges when remounting MMP-protected filesystems.","url":"https://insights.sbomify.com/GSD-2021-1001216/"}