CVE-2025-21875— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mptcp未在锁保护下处理地址移除操作，可能导致竞争条件。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | b6c08380860b926752d57c8fa9911fa388c4b876< 494ec285535632732eaa5786297a9ae4f731b5ff |
affected |
b6c08380860b926752d57c8fa9911fa388c4b876< 7cca31035c05819643ffb5d7518e9a331b3f6651 |
affected | ||
b6c08380860b926752d57c8fa9911fa388c4b876< 8116fb4acd5d3f06cd37f84887dbe962b6703b1c |
affected | ||
b6c08380860b926752d57c8fa9911fa388c4b876< a05da2be18aae7e82572f8d795f41bb49f5dfc7d |
affected | ||
b6c08380860b926752d57c8fa9911fa388c4b876< 4124b782ec2b1e2e490cf0bbf10f53dfd3479890 |
affected | ||
b6c08380860b926752d57c8fa9911fa388c4b876< 2c3de6dff4373f1036e003f49a32629359530bdb |
affected | ||
b6c08380860b926752d57c8fa9911fa388c4b876< f865c24bc55158313d5779fc81116023a6940ca3 |
affected | ||
5.10 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2025-21875 基础信息
漏洞信息
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Vulnerability Title
mptcp: always handle address removal under msk socket lock
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: always handle address removal under msk socket lock
Syzkaller reported a lockdep splat in the PM control path:
WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 sock_owned_by_me include/net/sock.h:1711 [inline]
WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 msk_owned_by_me net/mptcp/protocol.h:363 [inline]
WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788
Modules linked in:
CPU: 0 UID: 0 PID: 6693 Comm: syz.0.205 Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #0
Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:sock_owned_by_me include/net/sock.h:1711 [inline]
RIP: 0010:msk_owned_by_me net/mptcp/protocol.h:363 [inline]
RIP: 0010:mptcp_pm_nl_addr_send_ack+0x57c/0x610 net/mptcp/pm_netlink.c:788
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ca 7b d3 f5 eb b9 e8 c3 7b d3 f5 90 0f 0b 90 e9 dd fb ff ff e8 b5 7b d3 f5 90 <0f> 0b 90 e9 3e fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c eb fb ff ff
RSP: 0000:ffffc900034f6f60 EFLAGS: 00010283
RAX: ffffffff8bee3c2b RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc90004d42000 RSI: 000000000000a407 RDI: 000000000000a408
RBP: ffffc900034f7030 R08: ffffffff8bee37f6 R09: 0100000000000000
R10: dffffc0000000000 R11: ffffed100bcc62e4 R12: ffff88805e6316e0
R13: ffff88805e630c00 R14: dffffc0000000000 R15: ffff88805e630c00
FS: 00007f7e9a7e96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd18ff8 CR3: 0000000032c24000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
mptcp_pm_remove_addr+0x103/0x1d0 net/mptcp/pm.c:59
mptcp_pm_remove_anno_addr+0x1f4/0x2f0 net/mptcp/pm_netlink.c:1486
mptcp_nl_remove_subflow_and_signal_addr net/mptcp/pm_netlink.c:1518 [inline]
mptcp_pm_nl_del_addr_doit+0x118d/0x1af0 net/mptcp/pm_netlink.c:1629
genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0xb1f/0xec0 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2543
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:733
____sys_sendmsg+0x53a/0x860 net/socket.c:2573
___sys_sendmsg net/socket.c:2627 [inline]
__sys_sendmsg+0x269/0x350 net/socket.c:2659
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7e9998cde9
Code: 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
RSP: 002b:00007f7e9a7e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7e99ba5fa0 RCX: 00007f7e9998cde9
RDX: 000000002000c094 RSI: 0000400000000000 RDI: 0000000000000007
RBP: 00007f7e99a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7e99ba5fa0 R15: 00007fff49231088
Indeed the PM can try to send a RM_ADDR over a msk without acquiring
first the msk socket lock.
The bugged code-path comes from an early optimization: when there
are no subflows, the PM should (usually) not send RM_ADDR
notifications.
The above statement is incorrect, as without locks another process
could concur
---truncated---
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mptcp未在锁保护下处理地址移除操作，可能导致竞争条件。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2025-21875 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2025-21875 补丁与修复 (7)
同批安全公告 · Linux · 2025-03-27 · 共 124 条
| CVE-2023-53006 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-21876 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21890 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49755 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21887 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21889 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52930 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52931 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52934 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52935 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-53009 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52999 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52973 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52981 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52983 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52975 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52974 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52987 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-21867 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52988 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 124 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-21875
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