{ "document": { "aggregate_severity": { "text": "Important" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos8.4els/vex/2025/cve-2025-38250-els_os-centos8_4els.json" } ], "title": "Security update on CVE-2025-38250", "tracking": { "current_release_date": "2025-12-23T22:15:38Z", "generator": { "date": "2025-12-23T22:15:38Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2025-38250-ELS_OS-CENTOS8.4ELS", "initial_release_date": "2025-07-09T00:00:00Z", "revision_history": [ { "date": "2025-07-09T00:00:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-09-15T18:48:31Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-12-23T22:15:38Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "2" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 8.4", "product": { "name": "Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:8.4:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "product": { "name": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "product_id": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "product_identification_helper": { "purl": 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Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-ipaclones-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64" }, "product_reference": "kernel-ipaclones-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64" }, "product_reference": "kernel-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-headers-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-headers-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64" }, "product_reference": "kernel-headers-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "perf-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:perf-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64" }, "product_reference": "perf-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "relates_to_product_reference": "CentOS-8.4" } ] }, "vulnerabilities": [ { "cve": "CVE-2025-38250", "cwe": { "id": "CWE-362", "name": "Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: hci_core: Fix use-after-free in vhci_flush()\nsyzbot reported use-after-free in vhci_flush() without repro. [0]\nFrom the splat, a thread close()d a vhci file descriptor while\nits device was being used by iotcl() on another thread.\nOnce the last fd refcnt is released, vhci_release() calls\nhci_unregister_dev(), hci_free_dev(), and kfree() for struct\nvhci_data, which is set to hci_dev->dev->driver_data.\nThe problem is that there is no synchronisation after unlinking\nhdev from hci_dev_list in hci_unregister_dev(). There might be\nanother thread still accessing the hdev which was fetched before\nthe unlink operation.\nWe can use SRCU for such synchronisation.\nLet's run hci_dev_reset() under SRCU and wait for its completion\nin hci_unregister_dev().\nAnother option would be to restore hci_dev->destruct(), which was\nremoved in commit 587ae086f6e4 (\"Bluetooth: Remove unused\nhci-destruct cb\"). However, this would not be a good solution, as\nwe should not run hci_unregister_dev() while there are in-flight\nioctl() requests, which could lead to another data-race KCSAN splat.\nNote that other drivers seem to have the same problem, for exmaple,\nvirtbt_remove().\n[0]:\nBUG: KASAN: slab-use-after-free in skb_queue_empty_lockless include/linux/skbuff.h:1891 [inline]\nBUG: KASAN: slab-use-after-free in skb_queue_purge_reason+0x99/0x360 net/core/skbuff.c:3937\nRead of size 8 at addr ffff88807cb8d858 by task syz.1.219/6718\nCPU: 1 UID: 0 PID: 6718 Comm: syz.1.219 Not tainted 6.16.0-rc1-syzkaller-00196-g08207f42d3ff #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\nCall Trace:\n\ndump_stack_lvl+0x189/0x250 lib/dump_stack.c:120\nprint_address_description mm/kasan/report.c:408 [inline]\nprint_report+0xd2/0x2b0 mm/kasan/report.c:521\nkasan_report+0x118/0x150 mm/kasan/report.c:634\nskb_queue_empty_lockless include/linux/skbuff.h:1891 [inline]\nskb_queue_purge_reason+0x99/0x360 net/core/skbuff.c:3937\nskb_queue_purge include/linux/skbuff.h:3368 [inline]\nvhci_flush+0x44/0x50 drivers/bluetooth/hci_vhci.c:69\nhci_dev_do_reset net/bluetooth/hci_core.c:552 [inline]\nhci_dev_reset+0x420/0x5c0 net/bluetooth/hci_core.c:592\nsock_do_ioctl+0xd9/0x300 net/socket.c:1190\nsock_ioctl+0x576/0x790 net/socket.c:1311\nvfs_ioctl fs/ioctl.c:51 [inline]\n__do_sys_ioctl fs/ioctl.c:907 [inline]\n__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893\ndo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\ndo_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fcf5b98e929\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fcf5c7b9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007fcf5bbb6160 RCX: 00007fcf5b98e929\nRDX: 0000000000000000 RSI: 00000000400448cb RDI: 0000000000000009\nRBP: 00007fcf5ba10b39 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000000 R14: 00007fcf5bbb6160 R15: 00007ffd6353d528\n\nAllocated by task 6535:\nkasan_save_stack mm/kasan/common.c:47 [inline]\nkasan_save_track+0x3e/0x80 mm/kasan/common.c:68\npoison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394\nkasan_kmalloc include/linux/kasan.h:260 [inline]\n__kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4359\nkmalloc_noprof include/linux/slab.h:905 [inline]\nkzalloc_noprof include/linux/slab.h:1039 [inline]\nvhci_open+0x57/0x360 drivers/bluetooth/hci_vhci.c:635\nmisc_open+0x2bc/0x330 drivers/char/misc.c:161\nchrdev_open+0x4c9/0x5e0 fs/char_dev.c:414\ndo_dentry_open+0xdf0/0x1970 fs/open.c:964\nvfs_open+0x3b/0x340 fs/open.c:1094\ndo_open fs/namei.c:3887 [inline]\npath_openat+0x2ee5/0x3830 fs/name\n---truncated---", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "CentOS-8.4:kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:kernel-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:kernel-tools-libs-devel-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:kernel-core-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:bpftool-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", 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"CentOS-8.4:kernel-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:kernel-headers-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:perf-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2025-38250" } ], "release_date": "2025-07-09T00:00:00", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H", "version": "3.1" }, "products": [ "CentOS-8.4:kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", "CentOS-8.4:kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els31.x86_64", 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