{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40204 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40204 is a high-severity vulnerability in Linux, published on 12 Nov 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-2025-40204 and fix it if it is affected.\n\nWhat it is: CVE-2025-40204 is a high-severity vulnerability in Linux, published on 12 Nov 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-2025-40204 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-2025-40204/ (Markdown: https://insights.sbomify.com/CVE-2025-40204/index.md)","id":"CVE-2025-40204","markdown":"https://insights.sbomify.com/CVE-2025-40204/index.md","name":"CVE-2025-40204","record":{"aliases":["AZL-70112","BELL-CVE-2025-40204","DEBIAN-CVE-2025-40204","GHSA-4xv3-7wp7-qjp7","ROOT-OS-DEBIAN-11-CVE-2025-40204","ROOT-OS-DEBIAN-13-CVE-2025-40204","ROOT-OS-UBUNTU-2404-CVE-2025-40204","UBUNTU-CVE-2025-40204"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel SCTP","requires_auth":"none","summary":"An attacker can exploit timing side-channels in SCTP MAC comparisons to potentially recover sensitive information.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/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\nsctp: Fix MAC comparison to be constant-time\n\nTo prevent timing attacks, MACs need to be compared in constant time.\nUse the appropriate helper function for this.","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":"sctp: Fix MAC comparison to be constant-time","id":"CVE-2025-40204","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"btrfs: avoid potential out-of-bounds in btrfs_encode_fh()","id":"CVE-2025-40205"},"packages":[],"prev":{"headline":"listmount: don't call path_put() under namespace semaphore","id":"CVE-2025-40203"},"products":["Linux"],"published":"2025-11-12","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"An attacker can exploit timing side-channels in SCTP MAC comparisons to potentially recover sensitive information.","url":"https://insights.sbomify.com/CVE-2025-40204/"}