{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98242 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98242 is a vulnerability in Linux, published on 6 Oct 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-2026-98242 and fix it if it is affected.\n\nWhat it is: CVE-2026-98242 is a vulnerability in Linux, published on 6 Oct 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-2026-98242 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-2026-98242/ (Markdown: https://insights.sbomify.com/CVE-2026-98242/index.md)","id":"CVE-2026-98242","markdown":"https://insights.sbomify.com/CVE-2026-98242/index.md","name":"CVE-2026-98242","record":{"aliases":["DEBIAN-CVE-2026-98242","GHSA-vfw6-gcwv-53h6","UBUNTU-CVE-2026-98242"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","other"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A silent integer overflow in the Linux kernel's dma-buf subsystem can cause memory corruption or denial of service when handling large MMIO sizes.","user_interaction":"not_required","vuln_class":"integer_overflow"},"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\ndma-buf: Fix silent overflow for phys vec to sgt\n\nIn case MMIO size is bigger than 4G and peer2peer DMA goes\nthrough host bridge, we trigger a code path that assigns the\ntotal linked IOVA (which is greater than 4G) to mapped_len.\n\nPreviously, `mapped_len` was declared as 32-bit `unsigned int`.\nWhen accumulating `size_t` lengths, this leads to a silent wrap-around.\nThis truncation causes truncated lengths to be passed to functions\nlike `fill_sg_entry()`.\n\nFix this by changing `mapped_len` to `size_t` (64-bit). While\nat it, fix similar potential overflow issues in `calc_sg_nents`\nby using `check_add_overflow()` for `nents` and using\n`unsigned int` for the loop iterator in `fill_sg_entry` to match.","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":"dma-buf: Fix silent overflow for phys vec to sgt","id":"CVE-2026-98242","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"dma-buf/dma-fence: fix checking signaling bit for timeline and driver name v3","id":"CVE-2026-98243"},"packages":[],"prev":{"headline":"ipv6: xfrm: use full sockets in local error paths","id":"CVE-2026-98241"},"products":["Linux"],"published":"2026-10-06","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":"2026-10-19","vendors":["Linux"]},"summary":"A silent integer overflow in the Linux kernel's dma-buf subsystem can cause memory corruption or denial of service when handling large MMIO sizes.","url":"https://insights.sbomify.com/CVE-2026-98242/"}