{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-63820 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-63820 is a denial of service vulnerability in Linux, published on 19 Jul 2026. 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-2026-63820 and fix it if it is affected.\n\nWhat it is: CVE-2026-63820 is a denial of service vulnerability in Linux, published on 19 Jul 2026. 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-2026-63820 in the wild and no public exploit code.\n\nAffected product: 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-2026-63820/ (Markdown: https://insights.sbomify.com/CVE-2026-63820/index.md)","id":"CVE-2026-63820","markdown":"https://insights.sbomify.com/CVE-2026-63820/index.md","name":"CVE-2026-63820","record":{"aliases":["DEBIAN-CVE-2026-63820","GHSA-m33g-hj44-mvvf","UBUNTU-CVE-2026-63820"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A flaw in the Linux kernel f2fs filesystem can cause indefinite hangs during read operations, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix missing read bio submission on large folio error\n\nf2fs_read_data_large_folio() can keep a read bio across multiple\nreadahead folios.  If a later folio hits an error before any of its\nblocks are added to the bio, folio_in_bio is false and the current error\npath returns immediately after ending that folio.\n\nThis can leave the bio accumulated for earlier folios unsubmitted.  Those\nfolios then never receive read completion, and readers can wait\nindefinitely on the locked folios.\n\nRoute errors through the common out path so any pending bio is submitted\nbefore returning.  Stop consuming more readahead folios once an error is\nseen, and only wait on and clear the current folio when it was actually\nadded to the bio.","ecosystems":[],"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":"f2fs: fix missing read bio submission on large folio error","id":"CVE-2026-63820","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"wifi: rtw88: usb: fix memory leaks on USB write failures","id":"CVE-2026-63821"},"packages":[],"prev":{"headline":"f2fs: fix to do sanity check on f2fs_get_node_folio_ra()","id":"CVE-2026-63819"},"products":["Linux"],"published":"2026-07-19","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-17","vendors":["Linux"]},"summary":"A flaw in the Linux kernel f2fs filesystem can cause indefinite hangs during read operations, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-63820/"}