{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40363 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40363 is a memory corruption vulnerability in Linux, published on 16 Dec 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-2025-40363 and fix it if it is affected.\n\nWhat it is: CVE-2025-40363 is a memory corruption vulnerability in Linux, published on 16 Dec 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-2025-40363 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-2025-40363/ (Markdown: https://insights.sbomify.com/CVE-2025-40363/index.md)","id":"CVE-2025-40363","markdown":"https://insights.sbomify.com/CVE-2025-40363/index.md","name":"CVE-2025-40363","record":{"aliases":["BELL-CVE-2025-40363","DEBIAN-CVE-2025-40363","GHSA-9gfg-vfjm-p94q","ROOT-OS-DEBIAN-12-CVE-2025-40363","ROOT-OS-DEBIAN-13-CVE-2025-40363","ROOT-OS-UBUNTU-2204-CVE-2025-40363","ROOT-OS-UBUNTU-2404-CVE-2025-40363","UBUNTU-CVE-2025-40363"],"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 memory corruption issue in the Linux kernel IPv6 AH output path can cause a kernel warning and potential denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"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\nnet: ipv6: fix field-spanning memcpy warning in AH output\n\nFix field-spanning memcpy warnings in ah6_output() and\nah6_output_done() where extension headers are copied to/from IPv6\naddress fields, triggering fortify-string warnings about writes beyond\nthe 16-byte address fields.\n\n  memcpy: detected field-spanning write (size 40) of single field \"\u0026top_iph-\u003esaddr\" at net/ipv6/ah6.c:439 (size 16)\n  WARNING: CPU: 0 PID: 8838 at net/ipv6/ah6.c:439 ah6_output+0xe7e/0x14e0 net/ipv6/ah6.c:439\n\nThe warnings are false positives as the extension headers are\nintentionally placed after the IPv6 header in memory. Fix by properly\ncopying addresses and extension headers separately, and introduce\nhelper functions to avoid code duplication.","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":"net: ipv6: fix field-spanning memcpy warning in AH output","id":"CVE-2025-40363","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"io_uring: fix io_req_prep_async with provided buffers","id":"CVE-2025-40364"},"packages":[],"prev":{"headline":"ceph: fix multifs mds auth caps issue","id":"CVE-2025-40362"},"products":["Linux"],"published":"2025-12-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-16","vendors":["Linux"]},"summary":"A memory corruption issue in the Linux kernel IPv6 AH output path can cause a kernel warning and potential denial of service.","url":"https://insights.sbomify.com/CVE-2025-40363/"}