{"answers":{"affected":"1 open source package ship an affected version, including Kernel.","exploited":"There is no known exploitation of GSD-2021-1000439 in the wild and no public exploit code.","fix":"No fix has been published for GSD-2021-1000439 yet. Limit exposure of the affected software until one is available.","what":"GSD-2021-1000439 is a vulnerability in Kernel, published on 31 May 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-2021-1000439 and fix it if it is affected.\n\nWhat it is: GSD-2021-1000439 is a vulnerability in Kernel, published on 31 May 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-2021-1000439 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-2021-1000439/ (Markdown: https://insights.sbomify.com/GSD-2021-1000439/index.md)","id":"GSD-2021-1000439","markdown":"https://insights.sbomify.com/GSD-2021-1000439/index.md","name":"GSD-2021-1000439","record":{"aliases":[],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux Kernel KVM","requires_auth":"low_privilege","summary":"A null pointer dereference in KVM's coalesced MMIO handling can cause a kernel crash, requiring a local attacker with guest access to trigger.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"KVM: Stop looking for coalesced MMIO zones if the bus is destroyed\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 v5.4.119 by commit 7d1bc32d6477ff96a32695ea4be8144e4513ab2d, it was introduced in version v5.4.66 by commit 41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d. 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":"KVM: Stop looking for coalesced MMIO zones if the bus is destroyed","id":"GSD-2021-1000439","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"Linux","product":null,"products":[],"type":"null_dereference","year":"2021"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"Linux","fixed":[],"introduced":[],"last_affected":[],"package":"Kernel","purl":null,"source":"GSD-2021-1000439"}],"products":null,"published":"2021-05-31","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 null pointer dereference in KVM's coalesced MMIO handling can cause a kernel crash, requiring a local attacker with guest access to trigger.","url":"https://insights.sbomify.com/GSD-2021-1000439/"}