{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40340 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40340 is a vulnerability in Linux, published on 9 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-2025-40340 and fix it if it is affected.\n\nWhat it is: CVE-2025-40340 is a vulnerability in Linux, published on 9 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-2025-40340 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-2025-40340/ (Markdown: https://insights.sbomify.com/CVE-2025-40340/index.md)","id":"CVE-2025-40340","markdown":"https://insights.sbomify.com/CVE-2025-40340/index.md","name":"CVE-2025-40340","record":{"aliases":["BELL-CVE-2025-40340","DEBIAN-CVE-2025-40340","GHSA-c24v-836h-jr7p","ROOT-OS-DEBIAN-12-CVE-2025-40340","ROOT-OS-DEBIAN-13-CVE-2025-40340","ROOT-OS-UBUNTU-2204-CVE-2025-40340","ROOT-OS-UBUNTU-2404-CVE-2025-40340","UBUNTU-CVE-2025-40340"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"none","summary":"A null pointer dereference in the Linux kernel's Xe GPU driver allows local attackers to cause a system crash via memory mapping operations.","user_interaction":"not_required","vuln_class":"null_dereference"},"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\ndrm/xe: Fix oops in xe_gem_fault when running core_hotunplug test.\n\nI saw an oops in xe_gem_fault when running the xe-fast-feedback\ntestlist against the realtime kernel without debug options enabled.\n\nThe panic happens after core_hotunplug unbind-rebind finishes.\nPresumably what happens is that a process mmaps, unlocks because\nof the FAULT_FLAG_RETRY_NOWAIT logic, has no process memory left,\ncausing ttm_bo_vm_dummy_page() to return VM_FAULT_NOPAGE, since\nthere was nothing left to populate, and then oopses in\n\"mem_type_is_vram(tbo-\u003eresource-\u003emem_type)\" because tbo-\u003eresource\nis NULL.\n\nIt's convoluted, but fits the data and explains the oops after\nthe test exits.","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":"drm/xe: Fix oops in xe_gem_fault when running core_hotunplug test.","id":"CVE-2025-40340","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"futex: Don't leak robust_list pointer on exec race","id":"CVE-2025-40341"},"packages":[],"prev":{"headline":"drm/amdgpu: fix nullptr err of vm_handle_moved","id":"CVE-2025-40339"},"products":["Linux"],"published":"2025-12-09","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 null pointer dereference in the Linux kernel's Xe GPU driver allows local attackers to cause a system crash via memory mapping operations.","url":"https://insights.sbomify.com/CVE-2025-40340/"}