{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40046 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40046 is a high-severity vulnerability in Linux, published on 28 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-40046 and fix it if it is affected.\n\nWhat it is: CVE-2025-40046 is a high-severity vulnerability in Linux, published on 28 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-40046 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-2025-40046/ (Markdown: https://insights.sbomify.com/CVE-2025-40046/index.md)","id":"CVE-2025-40046","markdown":"https://insights.sbomify.com/CVE-2025-40046/index.md","name":"CVE-2025-40046","record":{"aliases":["BELL-CVE-2025-40046","DEBIAN-CVE-2025-40046","GHSA-f89g-f269-w35c","UBUNTU-CVE-2025-40046"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A double accounting bug in the Linux kernel's io_uring zero-copy receive path causes an integer underflow, potentially leading to a denial of service.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/zcrx: fix overshooting recv limit\n\nIt's reported that sometimes a zcrx request can receive more than was\nrequested. It's caused by io_zcrx_recv_skb() adjusting desc-\u003ecount for\nall received buffers including frag lists, but then doing recursive\ncalls to process frag list skbs, which leads to desc-\u003ecount double\naccounting and underflow.","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":"io_uring/zcrx: fix overshooting recv limit","id":"CVE-2025-40046","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2025"},"n_packages":0,"n_references":2,"next":{"headline":"io_uring/waitid: always prune wait queue entry in io_waitid_wait()","id":"CVE-2025-40047"},"packages":[],"prev":{"headline":"ASoC: codecs: wcd937x: set the comp soundwire port correctly","id":"CVE-2025-40045"},"products":["Linux"],"published":"2025-10-28","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 double accounting bug in the Linux kernel's io_uring zero-copy receive path causes an integer underflow, potentially leading to a denial of service.","url":"https://insights.sbomify.com/CVE-2025-40046/"}