{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: Fix use-after-free in ipvlan_get_iflink().\n\nsyzbot presented an use-after-free report [0] regarding ipvlan and\nlinkwatch.\n\nipvlan does not hold a refcnt of the lower device unlike vlan and\nmacvlan.\n\nIf the linkwatch work is triggered for the ipvlan dev, the lower dev\nmight have already been freed, resulting in UAF of ipvlan->phy_dev in\nipvlan_get_iflink().\n\nWe can delay the lower dev unregistration like vlan and macvlan by\nholding the lower dev's refcnt in dev->netdev_ops->ndo_init() and\nreleasing it in dev->priv_destructor().\n\nJakub pointed out calling .ndo_XXX after unregister_netdevice() has\nreturned is error prone and suggested [1] addressing this UAF in the\ncore by taking commit 750e51603395 (\"net: avoid potential UAF in\ndefault_operstate()\") further.\n\nLet's assume unregistering devices DOWN and use RCU protection in\ndefault_operstate() not to race with the device unregistration.\n\n[0]:\nBUG: KASAN: slab-use-after-free in ipvlan_get_iflink+0x84/0x88 drivers/net/ipvlan/ipvlan_main.c:353\nRead of size 4 at addr ffff0000d768c0e0 by task kworker/u8:35/6944\n\nCPU: 0 UID: 0 PID: 6944 Comm: kworker/u8:35 Not tainted 6.13.0-rc2-g9bc5c9515b48 #12 4c3cb9e8b4565456f6a355f312ff91f4f29b3c47\nHardware name: linux,dummy-virt (DT)\nWorkqueue: events_unbound linkwatch_event\nCall trace:\n show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:484 (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_load4_noabort+0x20/0x30 mm/kasan/report_generic.c:380\n ipvlan_get_iflink+0x84/0x88 drivers/net/ipvlan/ipvlan_main.c:353\n dev_get_iflink+0x7c/0xd8 net/core/dev.c:674\n default_operstate net/core/link_watch.c:45 [inline]\n rfc2863_policy+0x144/0x360 net/core/link_watch.c:72\n linkwatch_do_dev+0x60/0x228 net/core/link_watch.c:175\n __linkwatch_run_queue+0x2f4/0x5b8 net/core/link_watch.c:239\n linkwatch_event+0x64/0xa8 net/core/link_watch.c:282\n process_one_work+0x700/0x1398 kernel/workqueue.c:3229\n process_scheduled_works kernel/workqueue.c:3310 [inline]\n worker_thread+0x8c4/0xe10 kernel/workqueue.c:3391\n kthread+0x2b0/0x360 kernel/kthread.c:389\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862\n\nAllocated by task 9303:\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:4283 [inline]\n __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4289\n __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:650\n alloc_netdev_mqs+0xb4/0x1118 net/core/dev.c:11209\n rtnl_create_link+0x2b8/0xb60 net/core/rtnetlink.c:3595\n rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3771\n __rtnl_newlink net/core/rtnetlink.c:3896 [inline]\n rtnl_newlink+0x122c/0x15c0 net/core/rtnetlink.c:4011\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6901\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2542\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6928\n netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]\n netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1347\n netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1891\n sock_sendmsg_nosec net/socket.c:711 [inline]\n __sock_sendmsg net/socket.c:726 [inline]\n __sys_sendto+0x2ec/0x438 net/socket.c:2197\n __do_sys_sendto net/socket.c:2204 [inline]\n __se_sys_sendto net/socket.c:2200 [inline]\n __arm64_sys_sendto+0xe4/0x110 net/socket.c:2200\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 el\n---truncated---", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21652" }, { "summary":"CVE-2025-21652 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2025/csaf-openeuler-cve-2025-21652.json" }, { "summary":"openEuler-SA-2026-1229", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1229" }, { "summary":"CVE-2025-21652", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-21652&packageName=kernel" } ], "title":"openEuler cve CVE-2025-21652", "tracking":{ "initial_release_date":"2026-01-26T15:30:30+08:00", "revision_history":[ { "date":"2026-01-26T15:30:30+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-01-26T15:30:30+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-01-26T15:30:30+08:00", "id":"CVE-2025-21652", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP1" }, "product_id":"openEuler-24.03-LTS-SP1", "name":"openEuler-24.03-LTS-SP1" }, "name":"openEuler-24.03-LTS-SP1", "category":"product_version" } ], "category":"product_name" }, { "name":"src", "branches":[ { "product":{ "product_identification_helper":{ 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2025-21652", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: Fix use-after-free in ipvlan_get_iflink().\n\nsyzbot presented an use-after-free report [0] regarding ipvlan and\nlinkwatch.\n\nipvlan does not hold a refcnt of the lower device unlike vlan and\nmacvlan.\n\nIf the linkwatch work is triggered for the ipvlan dev, the lower dev\nmight have already been freed, resulting in UAF of ipvlan->phy_dev in\nipvlan_get_iflink().\n\nWe can delay the lower dev unregistration like vlan and macvlan by\nholding the lower dev's refcnt in dev->netdev_ops->ndo_init() and\nreleasing it in dev->priv_destructor().\n\nJakub pointed out calling .ndo_XXX after unregister_netdevice() has\nreturned is error prone and suggested [1] addressing this UAF in the\ncore by taking commit 750e51603395 (\"net: avoid potential UAF in\ndefault_operstate()\") further.\n\nLet's assume unregistering devices DOWN and use RCU protection in\ndefault_operstate() not to race with the device unregistration.\n\n[0]:\nBUG: KASAN: slab-use-after-free in ipvlan_get_iflink+0x84/0x88 drivers/net/ipvlan/ipvlan_main.c:353\nRead of size 4 at addr ffff0000d768c0e0 by task kworker/u8:35/6944\n\nCPU: 0 UID: 0 PID: 6944 Comm: kworker/u8:35 Not tainted 6.13.0-rc2-g9bc5c9515b48 #12 4c3cb9e8b4565456f6a355f312ff91f4f29b3c47\nHardware name: linux,dummy-virt (DT)\nWorkqueue: events_unbound linkwatch_event\nCall trace:\n show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:484 (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_load4_noabort+0x20/0x30 mm/kasan/report_generic.c:380\n ipvlan_get_iflink+0x84/0x88 drivers/net/ipvlan/ipvlan_main.c:353\n dev_get_iflink+0x7c/0xd8 net/core/dev.c:674\n default_operstate net/core/link_watch.c:45 [inline]\n rfc2863_policy+0x144/0x360 net/core/link_watch.c:72\n linkwatch_do_dev+0x60/0x228 net/core/link_watch.c:175\n __linkwatch_run_queue+0x2f4/0x5b8 net/core/link_watch.c:239\n linkwatch_event+0x64/0xa8 net/core/link_watch.c:282\n process_one_work+0x700/0x1398 kernel/workqueue.c:3229\n process_scheduled_works kernel/workqueue.c:3310 [inline]\n worker_thread+0x8c4/0xe10 kernel/workqueue.c:3391\n kthread+0x2b0/0x360 kernel/kthread.c:389\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862\n\nAllocated by task 9303:\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:4283 [inline]\n __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4289\n __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:650\n alloc_netdev_mqs+0xb4/0x1118 net/core/dev.c:11209\n rtnl_create_link+0x2b8/0xb60 net/core/rtnetlink.c:3595\n rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3771\n __rtnl_newlink net/core/rtnetlink.c:3896 [inline]\n rtnl_newlink+0x122c/0x15c0 net/core/rtnetlink.c:4011\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6901\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2542\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6928\n netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]\n netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1347\n netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1891\n sock_sendmsg_nosec net/socket.c:711 [inline]\n __sock_sendmsg net/socket.c:726 [inline]\n __sys_sendto+0x2ec/0x438 net/socket.c:2197\n __do_sys_sendto net/socket.c:2204 [inline]\n __se_sys_sendto net/socket.c:2200 [inline]\n __arm64_sys_sendto+0xe4/0x110 net/socket.c:2200\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 el\n---truncated---", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP1:kernel-6.6.0-135.0.0.129.oe2403sp1.src", "openEuler-24.03-LTS-SP1:bpftool-6.6.0-135.0.0.129.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:bpftool-debuginfo-6.6.0-135.0.0.129.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:kernel-6.6.0-135.0.0.129.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:kernel-debuginfo-6.6.0-135.0.0.129.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:kernel-debugsource-6.6.0-135.0.0.129.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:kernel-devel-6.6.0-135.0.0.129.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:kernel-headers-6.6.0-135.0.0.129.oe2403sp1.aarch64", 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"openEuler-24.03-LTS-SP1:kernel-tools-debuginfo-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:kernel-tools-devel-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:perf-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:perf-debuginfo-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:python3-perf-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:python3-perf-debuginfo-6.6.0-135.0.0.129.oe2403sp1.x86_64" ], "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1229" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.8, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":[ "openEuler-24.03-LTS-SP1:kernel-6.6.0-135.0.0.129.oe2403sp1.src", "openEuler-24.03-LTS-SP1:bpftool-6.6.0-135.0.0.129.oe2403sp1.aarch64", 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"openEuler-24.03-LTS-SP1:kernel-tools-devel-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:perf-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:perf-debuginfo-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:python3-perf-6.6.0-135.0.0.129.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:python3-perf-debuginfo-6.6.0-135.0.0.129.oe2403sp1.x86_64" ] } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2025-21652" } ] }