{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2025-38211 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-38211 is a critical use after free vulnerability in Debian Debian Linux, published on 4 Jul 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-2025-38211 and fix it if it is affected.\n\nWhat it is: CVE-2025-38211 is a critical use after free vulnerability in Debian Debian Linux, published on 4 Jul 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-2025-38211 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2025-38211/ (Markdown: https://insights.sbomify.com/CVE-2025-38211/index.md)","id":"CVE-2025-38211","markdown":"https://insights.sbomify.com/CVE-2025-38211/index.md","name":"CVE-2025-38211","record":{"aliases":["AZL-64686","BELL-CVE-2025-38211","DEBIAN-CVE-2025-38211","GHSA-wcw7-g3wh-rxf7","ROOT-OS-DEBIAN-11-CVE-2025-38211","ROOT-OS-DEBIAN-12-CVE-2025-38211","ROOT-OS-UBUNTU-2204-CVE-2025-38211","ROOT-OS-UBUNTU-2404-CVE-2025-38211","UBUNTU-CVE-2025-38211"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel RDMA","requires_auth":"none","summary":"A use-after-free in the Linux kernel RDMA subsystem allows attackers to execute arbitrary code or escalate privileges via crafted work object handling.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/iwcm: Fix use-after-free of work objects after cm_id destruction\n\nThe commit 59c68ac31e15 (\"iw_cm: free cm_id resources on the last\nderef\") simplified cm_id resource management by freeing cm_id once all\nreferences to the cm_id were removed. The references are removed either\nupon completion of iw_cm event handlers or when the application destroys\nthe cm_id. This commit introduced the use-after-free condition where\ncm_id_private object could still be in use by event handler works during\nthe destruction of cm_id. The commit aee2424246f9 (\"RDMA/iwcm: Fix a\nuse-after-free related to destroying CM IDs\") addressed this use-after-\nfree by flushing all pending works at the cm_id destruction.\n\nHowever, still another use-after-free possibility remained. It happens\nwith the work objects allocated for each cm_id_priv within\nalloc_work_entries() during cm_id creation, and subsequently freed in\ndealloc_work_entries() once all references to the cm_id are removed.\nIf the cm_id's last reference is decremented in the event handler work,\nthe work object for the work itself gets removed, and causes the use-\nafter-free BUG below:\n\n  BUG: KASAN: slab-use-after-free in __pwq_activate_work+0x1ff/0x250\n  Read of size 8 at addr ffff88811f9cf800 by task kworker/u16:1/147091\n\n  CPU: 2 UID: 0 PID: 147091 Comm: kworker/u16:1 Not tainted 6.15.0-rc2+ #27 PREEMPT(voluntary)\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014\n  Workqueue:  0x0 (iw_cm_wq)\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x6a/0x90\n   print_report+0x174/0x554\n   ? __virt_addr_valid+0x208/0x430\n   ? __pwq_activate_work+0x1ff/0x250\n   kasan_report+0xae/0x170\n   ? __pwq_activate_work+0x1ff/0x250\n   __pwq_activate_work+0x1ff/0x250\n   pwq_dec_nr_in_flight+0x8c5/0xfb0\n   process_one_work+0xc11/0x1460\n   ? __pfx_process_one_work+0x10/0x10\n   ? assign_work+0x16c/0x240\n   worker_thread+0x5ef/0xfd0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x3b0/0x770\n   ? __pfx_kthread+0x10/0x10\n   ? rcu_is_watching+0x11/0xb0\n   ? _raw_spin_unlock_irq+0x24/0x50\n   ? rcu_is_watching+0x11/0xb0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x30/0x70\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 147416:\n   kasan_save_stack+0x2c/0x50\n   kasan_save_track+0x10/0x30\n   __kasan_kmalloc+0xa6/0xb0\n   alloc_work_entries+0xa9/0x260 [iw_cm]\n   iw_cm_connect+0x23/0x4a0 [iw_cm]\n   rdma_connect_locked+0xbfd/0x1920 [rdma_cm]\n   nvme_rdma_cm_handler+0x8e5/0x1b60 [nvme_rdma]\n   cma_cm_event_handler+0xae/0x320 [rdma_cm]\n   cma_work_handler+0x106/0x1b0 [rdma_cm]\n   process_one_work+0x84f/0x1460\n   worker_thread+0x5ef/0xfd0\n   kthread+0x3b0/0x770\n   ret_from_fork+0x30/0x70\n   ret_from_fork_asm+0x1a/0x30\n\n  Freed by task 147091:\n   kasan_save_stack+0x2c/0x50\n   kasan_save_track+0x10/0x30\n   kasan_save_free_info+0x37/0x60\n   __kasan_slab_free+0x4b/0x70\n   kfree+0x13a/0x4b0\n   dealloc_work_entries+0x125/0x1f0 [iw_cm]\n   iwcm_deref_id+0x6f/0xa0 [iw_cm]\n   cm_work_handler+0x136/0x1ba0 [iw_cm]\n   process_one_work+0x84f/0x1460\n   worker_thread+0x5ef/0xfd0\n   kthread+0x3b0/0x770\n   ret_from_fork+0x30/0x70\n   ret_from_fork_asm+0x1a/0x30\n\n  Last potentially related work creation:\n   kasan_save_stack+0x2c/0x50\n   kasan_record_aux_stack+0xa3/0xb0\n   __queue_work+0x2ff/0x1390\n   queue_work_on+0x67/0xc0\n   cm_event_handler+0x46a/0x820 [iw_cm]\n   siw_cm_upcall+0x330/0x650 [siw]\n   siw_cm_work_handler+0x6b9/0x2b20 [siw]\n   process_one_work+0x84f/0x1460\n   worker_thread+0x5ef/0xfd0\n   kthread+0x3b0/0x770\n   ret_from_fork+0x30/0x70\n   ret_from_fork_asm+0x1a/0x30\n\nThis BUG is reproducible by repeating the blktests test case nvme/061\nfor the rdma transport and the siw driver.\n\nTo avoid the use-after-free of cm_id_private work objects, ensure that\nthe last reference to the cm_id is decremented not in the event handler\nworks, but in the cm_id destruction context. For that purpose, mo\n---truncated---","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":"RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction","id":"CVE-2025-38211","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"use_after_free","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"ipc: fix to protect IPCS lookups using RCU","id":"CVE-2025-38212"},"packages":[],"prev":{"headline":"configfs-tsm-report: Fix NULL dereference of tsm_ops","id":"CVE-2025-38210"},"products":["Linux"],"published":"2025-07-04","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel RDMA subsystem allows attackers to execute arbitrary code or escalate privileges via crafted work object handling.","url":"https://insights.sbomify.com/CVE-2025-38211/"}