{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89804 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89804 is a high-severity memory corruption vulnerability in Linux, published on 16 Sep 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-2026-89804 and fix it if it is affected.\n\nWhat it is: CVE-2026-89804 is a high-severity memory corruption vulnerability in Linux, published on 16 Sep 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-2026-89804 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-2026-89804/ (Markdown: https://insights.sbomify.com/CVE-2026-89804/index.md)","id":"CVE-2026-89804","markdown":"https://insights.sbomify.com/CVE-2026-89804/index.md","name":"CVE-2026-89804","record":{"aliases":["DEBIAN-CVE-2026-89804","GHSA-f67x-82w6-7jjx","UBUNTU-CVE-2026-89804"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["other"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A mismatched DMA unmap size in the nouveau driver leaks IOMMU mappings for large folios, potentially causing resource exhaustion or instability.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/dmem: fix mismatched DMA unmap size for large folios\n\nDevice-private THP migration maps migration buffers with page_size()\nand records that length in dma_info-\u003esize.  For a compound folio\npage_size() is PAGE_SIZE \u003c\u003c order, but two teardown sites still pass a\nliteral PAGE_SIZE to dma_unmap_page():\n\n  - nouveau_dmem_migrate_to_ram() on the success path, and\n  - nouveau_dmem_migrate_copy_one() on the copy-error path.\n\nFor an order \u003e 0 folio this unmaps less than was mapped, leaking the\nremainder of the IOMMU/IOVA mapping.  The other unmap sites, in\nnouveau_dmem_migrate_chunk() and nouveau_dmem_evict_chunk(), already\nuse the saved size; use it here too.","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":"drm/nouveau/dmem: fix mismatched DMA unmap size for large folios","id":"CVE-2026-89804","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"drm/pagemap: Fix folio allocation fallback and use-after-put","id":"CVE-2026-89805"},"packages":[],"prev":{"headline":"drm/nouveau: unsubscribe the channel-kill event before the fence context","id":"CVE-2026-89803"},"products":["Linux"],"published":"2026-09-16","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":"2026-10-19","vendors":["Linux"]},"summary":"A mismatched DMA unmap size in the nouveau driver leaks IOMMU mappings for large folios, potentially causing resource exhaustion or instability.","url":"https://insights.sbomify.com/CVE-2026-89804/"}