CVE-2024-26725— 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，该漏洞源于可能出现死锁。
可能的 ATT&CK 技术 1 AI
T1498 · Network Denial of Service
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一、 漏洞 CVE-2024-26725 基础信息
漏洞信息
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Vulnerability Title
dpll: fix possible deadlock during netlink dump operation
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
dpll: fix possible deadlock during netlink dump operation
Recently, I've been hitting following deadlock warning during dpll pin
dump:
[52804.637962] ======================================================
[52804.638536] WARNING: possible circular locking dependency detected
[52804.639111] 6.8.0-rc2jiri+ #1 Not tainted
[52804.639529] ------------------------------------------------------
[52804.640104] python3/2984 is trying to acquire lock:
[52804.640581] ffff88810e642678 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}, at: netlink_dump+0xb3/0x780
[52804.641417]
but task is already holding lock:
[52804.642010] ffffffff83bde4c8 (dpll_lock){+.+.}-{3:3}, at: dpll_lock_dumpit+0x13/0x20
[52804.642747]
which lock already depends on the new lock.
[52804.643551]
the existing dependency chain (in reverse order) is:
[52804.644259]
-> #1 (dpll_lock){+.+.}-{3:3}:
[52804.644836] lock_acquire+0x174/0x3e0
[52804.645271] __mutex_lock+0x119/0x1150
[52804.645723] dpll_lock_dumpit+0x13/0x20
[52804.646169] genl_start+0x266/0x320
[52804.646578] __netlink_dump_start+0x321/0x450
[52804.647056] genl_family_rcv_msg_dumpit+0x155/0x1e0
[52804.647575] genl_rcv_msg+0x1ed/0x3b0
[52804.648001] netlink_rcv_skb+0xdc/0x210
[52804.648440] genl_rcv+0x24/0x40
[52804.648831] netlink_unicast+0x2f1/0x490
[52804.649290] netlink_sendmsg+0x36d/0x660
[52804.649742] __sock_sendmsg+0x73/0xc0
[52804.650165] __sys_sendto+0x184/0x210
[52804.650597] __x64_sys_sendto+0x72/0x80
[52804.651045] do_syscall_64+0x6f/0x140
[52804.651474] entry_SYSCALL_64_after_hwframe+0x46/0x4e
[52804.652001]
-> #0 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}:
[52804.652650] check_prev_add+0x1ae/0x1280
[52804.653107] __lock_acquire+0x1ed3/0x29a0
[52804.653559] lock_acquire+0x174/0x3e0
[52804.653984] __mutex_lock+0x119/0x1150
[52804.654423] netlink_dump+0xb3/0x780
[52804.654845] __netlink_dump_start+0x389/0x450
[52804.655321] genl_family_rcv_msg_dumpit+0x155/0x1e0
[52804.655842] genl_rcv_msg+0x1ed/0x3b0
[52804.656272] netlink_rcv_skb+0xdc/0x210
[52804.656721] genl_rcv+0x24/0x40
[52804.657119] netlink_unicast+0x2f1/0x490
[52804.657570] netlink_sendmsg+0x36d/0x660
[52804.658022] __sock_sendmsg+0x73/0xc0
[52804.658450] __sys_sendto+0x184/0x210
[52804.658877] __x64_sys_sendto+0x72/0x80
[52804.659322] do_syscall_64+0x6f/0x140
[52804.659752] entry_SYSCALL_64_after_hwframe+0x46/0x4e
[52804.660281]
other info that might help us debug this:
[52804.661077] Possible unsafe locking scenario:
[52804.661671] CPU0 CPU1
[52804.662129] ---- ----
[52804.662577] lock(dpll_lock);
[52804.662924] lock(nlk_cb_mutex-GENERIC);
[52804.663538] lock(dpll_lock);
[52804.664073] lock(nlk_cb_mutex-GENERIC);
[52804.664490]
The issue as follows: __netlink_dump_start() calls control->start(cb)
with nlk->cb_mutex held. In control->start(cb) the dpll_lock is taken.
Then nlk->cb_mutex is released and taken again in netlink_dump(), while
dpll_lock still being held. That leads to ABBA deadlock when another
CPU races with the same operation.
Fix this by moving dpll_lock taking into dumpit() callback which ensures
correct lock taking order.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于可能出现死锁。
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-2024-26725 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-26725 其他参考 (2)
同批安全公告 · Linux · 2024-04-03 · 共 94 条
| CVE-2024-26760 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-26779 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26689 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26692 | 8.3 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26736 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26718 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26728 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52637 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26704 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26699 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26712 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26706 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26697 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26737 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26748 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26773 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26772 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26766 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26739 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26759 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 94 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-26725
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