{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-63954 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-63954 is a high-severity 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-2026-63954 and fix it if it is affected.\n\nWhat it is: CVE-2026-63954 is a high-severity 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-2026-63954 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-2026-63954/ (Markdown: https://insights.sbomify.com/CVE-2026-63954/index.md)","id":"CVE-2026-63954","markdown":"https://insights.sbomify.com/CVE-2026-63954/index.md","name":"CVE-2026-63954","record":{"aliases":["AZL-92757","BELL-CVE-2026-63954","DEBIAN-CVE-2026-63954","GHSA-67c6-765v-26g2","ROOT-OS-UBUNTU-2204-CVE-2026-63954","UBUNTU-CVE-2026-63954"],"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":"low_privilege","summary":"A local attacker can cause a system crash by triggering a null pointer dereference in the HPFS filesystem driver when bitmap mapping fails.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhpfs: fix a crash if hpfs_map_dnode_bitmap fails\n\nIf hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on\nuninitialized quad buffer head, causing a crash.","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":"hpfs: fix a crash if hpfs_map_dnode_bitmap fails","id":"CVE-2026-63954","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"mm/vmalloc: do not trigger BUG() on BH disabled context","id":"CVE-2026-63955"},"packages":[],"prev":{"headline":"mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page","id":"CVE-2026-63953"},"products":["Linux"],"published":"2026-07-19","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A local attacker can cause a system crash by triggering a null pointer dereference in the HPFS filesystem driver when bitmap mapping fails.","url":"https://insights.sbomify.com/CVE-2026-63954/"}