{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-71221 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-71221 is a high-severity vulnerability in Linux kernel, published on 14 Feb 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-2025-71221 and fix it if it is affected.\n\nWhat it is: CVE-2025-71221 is a high-severity vulnerability in Linux kernel, published on 14 Feb 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-2025-71221 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-2025-71221/ (Markdown: https://insights.sbomify.com/CVE-2025-71221/index.md)","id":"CVE-2025-71221","markdown":"https://insights.sbomify.com/CVE-2025-71221/index.md","name":"CVE-2025-71221","record":{"aliases":["BELL-CVE-2025-71221","DEBIAN-CVE-2025-71221","GHSA-959m-9w2w-7jxc","ROOT-OS-DEBIAN-11-CVE-2025-71221","ROOT-OS-DEBIAN-12-CVE-2025-71221","ROOT-OS-DEBIAN-13-CVE-2025-71221","ROOT-OS-UBUNTU-2204-CVE-2025-71221","ROOT-OS-UBUNTU-2404-CVE-2025-71221","UBUNTU-CVE-2025-71221"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel MMP PDMA driver allows use-after-free, potentially leading to code execution or denial of service.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()\n\nAdd proper locking in mmp_pdma_residue() to prevent use-after-free when\naccessing descriptor list and descriptor contents.\n\nThe race occurs when multiple threads call tx_status() while the tasklet\non another CPU is freeing completed descriptors:\n\nCPU 0                              CPU 1\n-----                              -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n  -\u003e NO LOCK held\n     list_for_each_entry(sw, ..)\n                                   DMA interrupt\n                                   dma_do_tasklet()\n                                     -\u003e spin_lock(\u0026desc_lock)\n                                        list_move(sw-\u003enode, ...)\n                                        spin_unlock(\u0026desc_lock)\n  |                                     dma_pool_free(sw) \u003c- FREED!\n  -\u003e access sw-\u003edesc \u003c- UAF!\n\nThis issue can be reproduced when running dmatest on the same channel with\nmultiple threads (threads_per_chan \u003e 1).\n\nFix by protecting the chain_running list iteration and descriptor access\nwith the chan-\u003edesc_lock spinlock.","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":"dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()","id":"CVE-2025-71221","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"race_condition","year":"2025"},"n_packages":0,"n_references":6,"next":{"headline":"wifi: wlcore: ensure skb headroom before skb_push","id":"CVE-2025-71222"},"packages":[],"prev":{"headline":"smb/server: call ksmbd_session_rpc_close() on error path in create_smb2_pipe()","id":"CVE-2025-71220"},"products":["Linux"],"published":"2026-02-14","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A race condition in the Linux kernel MMP PDMA driver allows use-after-free, potentially leading to code execution or denial of service.","url":"https://insights.sbomify.com/CVE-2025-71221/"}