CVE-2025-21652

一、漏洞信息
 漏洞编号：[CVE-2025-21652](https://nvd.nist.gov/vuln/detail/CVE-2025-21652)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:ipvlan: Fix use-after-free in ipvlan_get_iflink().syzbot presented an use-after-free report [0] regarding ipvlan andlinkwatch.ipvlan does not hold a refcnt of the lower device unlike vlan andmacvlan.If the linkwatch work is triggered for the ipvlan dev, the lower devmight have already been freed, resulting in UAF of ipvlan->phy_dev inipvlan_get_iflink().We can delay the lower dev unregistration like vlan and macvlan byholding the lower dev s refcnt in dev->netdev_ops->ndo_init() andreleasing it in dev->priv_destructor().Jakub pointed out calling .ndo_XXX after unregister_netdevice() hasreturned is error prone and suggested [1] addressing this UAF in thecore by taking commit 750e51603395 ( net: avoid potential UAF indefault_operstate() ) further.Let s assume unregistering devices DOWN and use RCU protection indefault_operstate() not to race with the device unregistration.[0]:BUG: KASAN: slab-use-after-free in ipvlan_get_iflink+0x84/0x88 drivers/net/ipvlan/ipvlan_main.c:353Read of size 4 at addr ffff0000d768c0e0 by task kworker/u8:35/6944CPU: 0 UID: 0 PID: 6944 Comm: kworker/u8:35 Not tainted 6.13.0-rc2-g9bc5c9515b48 #12 4c3cb9e8b4565456f6a355f312ff91f4f29b3c47Hardware name: linux,dummy-virt (DT)Workqueue: events_unbound linkwatch_eventCall trace: show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:484 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x16c/0x6f0 mm/kasan/report.c:489 kasan_report+0xc0/0x120 mm/kasan/report.c:602 __asan_report_load4_noabort+0x20/0x30 mm/kasan/report_generic.c:380 ipvlan_get_iflink+0x84/0x88 drivers/net/ipvlan/ipvlan_main.c:353 dev_get_iflink+0x7c/0xd8 net/core/dev.c:674 default_operstate net/core/link_watch.c:45 [inline] rfc2863_policy+0x144/0x360 net/core/link_watch.c:72 linkwatch_do_dev+0x60/0x228 net/core/link_watch.c:175 __linkwatch_run_queue+0x2f4/0x5b8 net/core/link_watch.c:239 linkwatch_event+0x64/0xa8 net/core/link_watch.c:282 process_one_work+0x700/0x1398 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x8c4/0xe10 kernel/workqueue.c:3391 kthread+0x2b0/0x360 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862Allocated by task 9303: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x30/0x68 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4283 [inline] __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4289 __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:650 alloc_netdev_mqs+0xb4/0x1118 net/core/dev.c:11209 rtnl_create_link+0x2b8/0xb60 net/core/rtnetlink.c:3595 rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3771 __rtnl_newlink net/core/rtnetlink.c:3896 [inline] rtnl_newlink+0x122c/0x15c0 net/core/rtnetlink.c:4011 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6901 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2542 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6928 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] __sys_sendto+0x2ec/0x438 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __arm64_sys_sendto+0xe4/0x110 net/socket.c:2200 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151 el---truncated---
 漏洞公开时间：2025-01-19 19:15:10
 漏洞创建时间：2025-01-19 20:28:34
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2025-21652
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/52a24538d569f48e79d1a169a5d359d384152950 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/ba9f7c16ec879c83bb4f80406773a911aace8267 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/cb358ff94154774d031159b018adf45e17673941 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21652 | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21652.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| suse_bugzilla | https://git.kernel.org/stable/c/ba9f7c16ec879c83bb4f80406773a911aace8267 | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| suse_bugzilla | https://git.kernel.org/stable/c/52a24538d569f48e79d1a169a5d359d384152950 | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| suse_bugzilla | https://git.kernel.org/stable/c/cb358ff94154774d031159b018adf45e17673941 | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2025-21652 | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2338821 | https://bugzilla.suse.com/show_bug.cgi?id=1236160 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025011947-CVE-2025-21652-95d7@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2338821 |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  openBrain开源漏洞感知系统
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
| linux_kernel | 6.6.72 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ba9f7c16ec879c83bb4f80406773a911aace8267Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8c55facecd7ade835287298ce325f930d888d8ec | linuxkernelcves |
| linux_kernel | 6.12.10 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=52a24538d569f48e79d1a169a5d359d384152950Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8c55facecd7ade835287298ce325f930d888d8ec | linuxkernelcves |
| linux_kernel | 6.13-rc7 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=cb358ff94154774d031159b018adf45e17673941Please | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8c55facecd7ade835287298ce325f930d888d8ec | linuxkernelcves |

</details>
 
二、漏洞分析结构反馈
 影响性分析说明：
  
 openEuler评分：
   
 受影响版本排查(受影响/不受影响)：
  1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

修复是否涉及abi变化(是/否)：
  1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

原因说明：
  1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

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CVE-2025-21652

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