{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40019 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40019 is a vulnerability in Linux, published on 24 Oct 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-2025-40019 and fix it if it is affected.\n\nWhat it is: CVE-2025-40019 is a vulnerability in Linux, published on 24 Oct 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-2025-40019 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-2025-40019/ (Markdown: https://insights.sbomify.com/CVE-2025-40019/index.md)","id":"CVE-2025-40019","markdown":"https://insights.sbomify.com/CVE-2025-40019/index.md","name":"CVE-2025-40019","record":{"aliases":["AZL-68766","BELL-CVE-2025-40019","DEBIAN-CVE-2025-40019","GHSA-jrm5-c55w-xm5w","ROOT-OS-DEBIAN-11-CVE-2025-40019","ROOT-OS-DEBIAN-12-CVE-2025-40019","ROOT-OS-DEBIAN-13-CVE-2025-40019","ROOT-OS-UBUNTU-2204-CVE-2025-40019","ROOT-OS-UBUNTU-2404-CVE-2025-40019","UBUNTU-CVE-2025-40019","USN-8013-1","USN-8013-2","USN-8013-3","USN-8013-4","USN-8015-1","USN-8015-3","USN-8015-4","USN-8015-5"],"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 missing size check in the Linux kernel's ESSIV crypto module can lead to integer overflow issues during decryption or in-place encryption, potentially causing a denial of service.","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\ncrypto: essiv - Check ssize for decryption and in-place encryption\n\nMove the ssize check to the start in essiv_aead_crypt so that\nit's also checked for decryption and in-place encryption.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2025-12-30","github_poc":2,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2025-12-30T17:11:22Z","kind":"github_poc","ref":"https://github.com/xooxo/CVE-2025-40019-Essiv","stars":0,"title":"A PoC for CVE-2025-40019 in ESSIV module. (exploit WIP)"},{"date":"2026-01-02T06:01:17Z","kind":"github_poc","ref":"https://github.com/0xAtharv/CVE-2025-40019-POC","stars":0,"title":"A Proof Of Concept for CVE-2025-40019"}],"tier":"poc_unverified"},"has_fix":true,"headline":"crypto: essiv - Check ssize for decryption and in-place encryption","id":"CVE-2025-40019","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"can: peak_usb: fix shift-out-of-bounds issue","id":"CVE-2025-40020"},"packages":[],"prev":{"headline":"ipvs: Defer ip_vs_ftp unregister during netns cleanup","id":"CVE-2025-40018"},"products":["Linux"],"published":"2025-10-24","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A missing size check in the Linux kernel's ESSIV crypto module can lead to integer overflow issues during decryption or in-place encryption, potentially causing a denial of service.","url":"https://insights.sbomify.com/CVE-2025-40019/"}