{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40305 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40305 is a denial of service vulnerability in Linux, published on 8 Dec 2025. 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-2025-40305 and fix it if it is affected.\n\nWhat it is: CVE-2025-40305 is a denial of service vulnerability in Linux, published on 8 Dec 2025. 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-2025-40305 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-2025-40305/ (Markdown: https://insights.sbomify.com/CVE-2025-40305/index.md)","id":"CVE-2025-40305","markdown":"https://insights.sbomify.com/CVE-2025-40305/index.md","name":"CVE-2025-40305","record":{"aliases":["BELL-CVE-2025-40305","DEBIAN-CVE-2025-40305","GHSA-jr46-vc8c-pm2x","ROOT-OS-DEBIAN-12-CVE-2025-40305","ROOT-OS-DEBIAN-13-CVE-2025-40305","ROOT-OS-UBUNTU-2204-CVE-2025-40305","ROOT-OS-UBUNTU-2404-CVE-2025-40305","UBUNTU-CVE-2025-40305"],"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 9p filesystem transport can cause a denial of service by failing to wake up the read thread when the pipe is full.","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\n9p/trans_fd: p9_fd_request: kick rx thread if EPOLLIN\n\np9_read_work() doesn't set Rworksched and doesn't do schedule_work(m-\u003erq)\nif list_empty(\u0026m-\u003ereq_list).\n\nHowever, if the pipe is full, we need to read more data and this used to\nwork prior to commit aaec5a95d59615 (\"pipe_read: don't wake up the writer\nif the pipe is still full\").\n\np9_read_work() does p9_fd_read() -\u003e ... -\u003e anon_pipe_read() which (before\nthe commit above) triggered the unnecessary wakeup. This wakeup calls\np9_pollwake() which kicks p9_poll_workfn() -\u003e p9_poll_mux(), p9_poll_mux()\nwill notice EPOLLIN and schedule_work(\u0026m-\u003erq).\n\nThis no longer happens after the optimization above, change p9_fd_request()\nto use p9_poll_mux() instead of only checking for EPOLLOUT.","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":"9p/trans_fd: p9_fd_request: kick rx thread if EPOLLIN","id":"CVE-2025-40305","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":2,"next":{"headline":"orangefs: fix xattr related buffer overflow...","id":"CVE-2025-40306"},"packages":[],"prev":{"headline":"fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds","id":"CVE-2025-40304"},"products":["Linux"],"published":"2025-12-08","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":"2026-05-11","vendors":["Linux"]},"summary":"A flaw in the Linux kernel 9p filesystem transport can cause a denial of service by failing to wake up the read thread when the pipe is full.","url":"https://insights.sbomify.com/CVE-2025-40305/"}