{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-71142 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-71142 is a medium-severity denial of service vulnerability in Linux kernel, published on 14 Jan 2026. 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-2025-71142 and fix it if it is affected.\n\nWhat it is: CVE-2025-71142 is a medium-severity denial of service vulnerability in Linux kernel, published on 14 Jan 2026. 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-2025-71142 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2025-71142/ (Markdown: https://insights.sbomify.com/CVE-2025-71142/index.md)","id":"CVE-2025-71142","markdown":"https://insights.sbomify.com/CVE-2025-71142/index.md","name":"CVE-2025-71142","record":{"aliases":["BELL-CVE-2025-71142","DEBIAN-CVE-2025-71142","GHSA-v6j2-j656-xqq8","UBUNTU-CVE-2025-71142"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a kernel warning and potential instability by manipulating cpuset partitions after offlining CPUs.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpuset: fix warning when disabling remote partition\n\nA warning was triggered as follows:\n\nWARNING: kernel/cgroup/cpuset.c:1651 at remote_partition_disable+0xf7/0x110\nRIP: 0010:remote_partition_disable+0xf7/0x110\nRSP: 0018:ffffc90001947d88 EFLAGS: 00000206\nRAX: 0000000000007fff RBX: ffff888103b6e000 RCX: 0000000000006f40\nRDX: 0000000000006f00 RSI: ffffc90001947da8 RDI: ffff888103b6e000\nRBP: ffff888103b6e000 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000001 R11: ffff88810b2e2728 R12: ffffc90001947da8\nR13: 0000000000000000 R14: ffffc90001947da8 R15: ffff8881081f1c00\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f55c8bbe0b2 CR3: 000000010b14c000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n update_prstate+0x2d3/0x580\n cpuset_partition_write+0x94/0xf0\n kernfs_fop_write_iter+0x147/0x200\n vfs_write+0x35d/0x500\n ksys_write+0x66/0xe0\n do_syscall_64+0x6b/0x390\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7f55c8cd4887\n\nReproduction steps (on a 16-CPU machine):\n\n        # cd /sys/fs/cgroup/\n        # mkdir A1\n        # echo +cpuset \u003e A1/cgroup.subtree_control\n        # echo \"0-14\" \u003e A1/cpuset.cpus.exclusive\n        # mkdir A1/A2\n        # echo \"0-14\" \u003e A1/A2/cpuset.cpus.exclusive\n        # echo \"root\" \u003e A1/A2/cpuset.cpus.partition\n        # echo 0 \u003e /sys/devices/system/cpu/cpu15/online\n        # echo member \u003e A1/A2/cpuset.cpus.partition\n\nWhen CPU 15 is offlined, subpartitions_cpus gets cleared because no CPUs\nremain available for the top_cpuset, forcing partitions to share CPUs with\nthe top_cpuset. In this scenario, disabling the remote partition triggers\na warning stating that effective_xcpus is not a subset of\nsubpartitions_cpus. Partitions should be invalidated in this case to\ninform users that the partition is now invalid(cpus are shared with\ntop_cpuset).\n\nTo fix this issue:\n1. Only emit the warning only if subpartitions_cpus is not empty and the\n   effective_xcpus is not a subset of subpartitions_cpus.\n2. During the CPU hotplug process, invalidate partitions if\n   subpartitions_cpus is empty.","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":"cpuset: fix warning when disabling remote partition","id":"CVE-2025-71142","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"clk: samsung: exynos-clkout: Assign .num before accessing .hws","id":"CVE-2025-71143"},"packages":[],"prev":{"headline":"drm/tilcdc: Fix removal actions in case of failed probe","id":"CVE-2025-71141"},"products":["Linux"],"published":"2026-01-14","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-09-14","vendors":["Linux"]},"summary":"A local attacker can trigger a kernel warning and potential instability by manipulating cpuset partitions after offlining CPUs.","url":"https://insights.sbomify.com/CVE-2025-71142/"}