{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40276 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40276 is a high-severity vulnerability in Linux, published on 6 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-2025-40276 and fix it if it is affected.\n\nWhat it is: CVE-2025-40276 is a high-severity vulnerability in Linux, published on 6 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-2025-40276 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-2025-40276/ (Markdown: https://insights.sbomify.com/CVE-2025-40276/index.md)","id":"CVE-2025-40276","markdown":"https://insights.sbomify.com/CVE-2025-40276/index.md","name":"CVE-2025-40276","record":{"aliases":["BELL-CVE-2025-40276","DEBIAN-CVE-2025-40276","GHSA-f4hh-m2gg-974r","ROOT-OS-DEBIAN-13-CVE-2025-40276","UBUNTU-CVE-2025-40276"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A missing cache flush in the Panthor GPU driver allows attackers to read sensitive data or cause buffer corruption via dirty cache lines.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Flush shmem writes before mapping buffers CPU-uncached\n\nThe shmem layer zeroes out the new pages using cached mappings, and if\nwe don't CPU-flush we might leave dirty cachelines behind, leading to\npotential data leaks and/or asynchronous buffer corruption when dirty\ncachelines are evicted.","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/panthor: Flush shmem writes before mapping buffers CPU-uncached","id":"CVE-2025-40276","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE","id":"CVE-2025-40277"},"packages":[],"prev":{"headline":"ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd","id":"CVE-2025-40275"},"products":["Linux"],"published":"2025-12-06","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A missing cache flush in the Panthor GPU driver allows attackers to read sensitive data or cause buffer corruption via dirty cache lines.","url":"https://insights.sbomify.com/CVE-2025-40276/"}