{ "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-2025-21858-els_os-centos8_4els.json" } ], "title": "Security update on CVE-2025-21858", "tracking": { "current_release_date": "2025-12-23T22:15:38Z", "generator": { "date": "2025-12-23T22:15:38Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2025-21858-ELS_OS-CENTOS8.4ELS", "initial_release_date": "2025-03-12T10:15:00Z", "revision_history": [ { "date": "2025-03-12T10:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-05-19T21:04:40Z", "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.els27.x86_64", "product": { "name": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_id": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-debug-modules-extra@4.18.0-305.25.1.el8_4.tuxcare.els27?arch=x86_64" } } }, { "category": "product_version", "name": "python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product": { "name": "python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_id": "python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/python3-perf@4.18.0-305.25.1.el8_4.tuxcare.els27?arch=x86_64" } } }, { "category": "product_version", "name": "kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product": { "name": "kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_id": "kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-modules-internal@4.18.0-305.25.1.el8_4.tuxcare.els27?arch=x86_64" } } }, { "category": "product_version", "name": 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"product_version", "name": "kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product": { "name": "kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_id": "kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-debug@4.18.0-305.25.1.el8_4.tuxcare.els27?arch=x86_64" } } }, { "category": "product_version", "name": "kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product": { "name": "kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_id": "kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/kernel-debug-core@4.18.0-305.25.1.el8_4.tuxcare.els27?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "kernel-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-tools-libs-devel-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-tools-libs-devel-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": 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"kernel-debug-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-debug-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "kernel-debug-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" }, { "category": "default_component_of", "full_product_name": { "name": "kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64 as a component of Community Enterprise Operating System 8.4", "product_id": "CentOS-8.4:kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" }, "product_reference": "kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "relates_to_product_reference": "CentOS-8.4" } ] }, "vulnerabilities": [ { "cve": "CVE-2025-21858", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ngeneve: Fix use-after-free in geneve_find_dev().\n\nsyzkaller reported a use-after-free in geneve_find_dev() [0]\nwithout repro.\n\ngeneve_configure() links struct geneve_dev.next to\nnet_generic(net, geneve_net_id)->geneve_list.\n\nThe net here could differ from dev_net(dev) if IFLA_NET_NS_PID,\nIFLA_NET_NS_FD, or IFLA_TARGET_NETNSID is set.\n\nWhen dev_net(dev) is dismantled, geneve_exit_batch_rtnl() finally\ncalls unregister_netdevice_queue() for each dev in the netns,\nand later the dev is freed.\n\nHowever, its geneve_dev.next is still linked to the backend UDP\nsocket netns.\n\nThen, use-after-free will occur when another geneve dev is created\nin the netns.\n\nLet's call geneve_dellink() instead in geneve_destroy_tunnels().\n\n[0]:\nBUG: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline]\nBUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\nRead of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441\n\nCPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d\nHardware name: linux,dummy-virt (DT)\nCall trace:\n show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C)\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0x16c/0x6f0 mm/kasan/report.c:489\n kasan_report+0xc0/0x120 mm/kasan/report.c:602\n __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379\n geneve_find_dev drivers/net/geneve.c:1295 [inline]\n geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\n geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634\n rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\n netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\n netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348\n netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892\n sock_sendmsg_nosec net/socket.c:713 [inline]\n __sock_sendmsg net/socket.c:728 [inline]\n ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568\n ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622\n __sys_sendmsg net/socket.c:2654 [inline]\n __do_sys_sendmsg net/socket.c:2659 [inline]\n __se_sys_sendmsg net/socket.c:2657 [inline]\n __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657\n __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49\n el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132\n do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151\n el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744\n el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762\n el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600\n\nAllocated by task 13247:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x30/0x68 mm/kasan/common.c:68\n kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568\n poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394\n kasan_kmalloc include/linux/kasan.h:260 [inline]\n __do_kmalloc_node mm/slub.c:4298 [inline]\n __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304\n __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645\n alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470\n rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604\n rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\n netlink_unicast_kernel net/netlink/af_n\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.els27.x86_64", "CentOS-8.4:python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-modules-internal-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-tools-libs-devel-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:bpftool-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-debug-modules-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-debug-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:kernel-debug-core-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2025-21858" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/3ce92ca990cfac88a87c61df3cc0b5880e688ecf", "url": "https://git.kernel.org/stable/c/3ce92ca990cfac88a87c61df3cc0b5880e688ecf" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/5a0538ac6826807d6919f6aecbb8996c2865af2c", "url": "https://git.kernel.org/stable/c/5a0538ac6826807d6919f6aecbb8996c2865af2c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/788dbca056a8783ec063da3c9d49a3a71c76c283", "url": "https://git.kernel.org/stable/c/788dbca056a8783ec063da3c9d49a3a71c76c283" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/904e746b2e7fa952ab8801b303ce826a63153d78", "url": "https://git.kernel.org/stable/c/904e746b2e7fa952ab8801b303ce826a63153d78" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/9593172d93b9f91c362baec4643003dc29802929", "url": "https://git.kernel.org/stable/c/9593172d93b9f91c362baec4643003dc29802929" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d5e86e27de0936f3cb0a299ce519d993e9cf3886", "url": "https://git.kernel.org/stable/c/d5e86e27de0936f3cb0a299ce519d993e9cf3886" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/da9b0ae47f084014b1e4b3f31f70a0defd047ff3", "url": "https://git.kernel.org/stable/c/da9b0ae47f084014b1e4b3f31f70a0defd047ff3" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/f74f6560146714241c6e167b03165ee77a86e316", "url": "https://git.kernel.org/stable/c/f74f6560146714241c6e167b03165ee77a86e316" } ], "release_date": "2025-03-12T10:15:00", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "CentOS-8.4:kernel-debug-modules-extra-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", "CentOS-8.4:python3-perf-0:4.18.0-305.25.1.el8_4.tuxcare.els27.x86_64", 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