CVE-2026-99025— Open vSwitch 网络链路流转储软锁死漏洞
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。
在 Linux 内核中，以下漏洞已得到修复： openvswitch：修复 netlink 流表转储时的软锁死（soft lockup）问题 在生产环境中，某计算节点承载了数千条数据平面流（datapath flows），在执行单次 netlink 流表转储时触发了软锁死，最终导致系统恐慌（panic）。 具体原因如下： 在输出每一条流时都会调用 。该函数会对每个曾访问过该流的 CPU 执行一次 来释放 。每次释放都会触发 ，进而在执行转储的线程上下文中运行待处理的软中断（softirq）积压任务。 虽然套接字缓冲
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 63e7959c4b9bd6f791061c460a22d9ee32ae2240< c995c52eba1926a5e82823fa5573a6f1b1010e5d |
affected |
63e7959c4b9bd6f791061c460a22d9ee32ae2240< b872de585edff534056c65ba30970b68499fca14 |
affected | ||
63e7959c4b9bd6f791061c460a22d9ee32ae2240< 55f12552b00a34ca7ab5cf2d2b5ed02f8f06a965 |
affected | ||
63e7959c4b9bd6f791061c460a22d9ee32ae2240< 80db24f3c16fdeef85460d9d66a4aae7a9cb92b4 |
affected | ||
63e7959c4b9bd6f791061c460a22d9ee32ae2240< aaaaf87ea99b8766c9a8aa0e71aa42e6bc8a5320 |
affected | ||
3.16 |
affected | ||
< 3.16 |
unaffected | ||
6.6.160≤ 6.6.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2026-99025 基础信息
漏洞信息
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Vulnerability Title
openvswitch: fix soft lockup in the netlink flow dump
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
openvswitch: fix soft lockup in the netlink flow dump
A production compute node carrying a few thousand datapath flows hit a
soft lockup inside a single netlink flow dump and panicked.
ovs_flow_cmd_dump() calls ovs_flow_stats_get() for every flow it
emits, and that releases stats->lock with spin_unlock_bh() once per
CPU that has touched the flow. Every release is a local_bh_enable(),
and each one runs the pending softirq backlog in the dumping thread's
own context.
The skb bounds the flows one callback emits, but not the softirq work
it absorbs. On a CPU that carries the box's packet load the backlog
refills as fast as it drains, so the dumping thread becomes that CPU's
softirq engine. It never sleeps and it has no reschedule point, so
under voluntary preemption nothing can take the CPU away from it:
neither the ksoftirqd the kernel woke to take the work over, nor the
stopper thread the softlockup detector dispatches to refresh its
timestamp.
Hold BH off across the whole callback instead, the way
ctnetlink_dump_table() does, so the nested spin_unlock_bh() stop
draining softirqs. The loop already runs under rcu_read_lock() and
cannot sleep. What it gives up is preemption under CONFIG_PREEMPT,
since a BH-off region is not preemptible outside PREEMPT_RT. The
region stays short: the skb caps the flows one callback emits, and
empty buckets cost no skb space but are each visited once per dump, as
the cursor only moves forward. The table grows on insert and shrinks
only on flush, so the walk is bounded by the largest flow count the
datapath has held. The softirq backlog the callback used to absorb has
no bound at all.
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
受影响产品
二、漏洞 CVE-2026-99025 的公开POC
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|---|
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CVE-2026-99025 补丁与修复 (5)
同批安全公告 · Linux · 2026-10-23 · 共 217 条
| CVE-2026-98959 | 9.8 CRITICAL | btrfs 扩展属性替换处理远程代码执行漏洞 |
| CVE-2026-99078 | 9.8 CRITICAL | Mellanox mlx5e MPWQE重试时XSK缓冲区释放漏洞 |
| CVE-2026-99079 | 9.8 CRITICAL | Mellanox mlx5e 驱动 XSK 缓冲区释放漏洞 |
| CVE-2026-98988 | 8.8 HIGH | Linux 5.13 命名空间越界漏洞 |
| CVE-2026-99083 | 8.8 HIGH | ksmbd 的 krb5_authenticate() 函数堆越界写漏洞 |
| CVE-2026-99082 | 8.8 HIGH | KVM x86 内存管理漏洞 |
| CVE-2026-98870 | 8.8 HIGH | ksmbd 会话清理时存在通道移除逻辑漏洞 |
| CVE-2026-98980 | 8.8 HIGH | namei 遍历中过度挂载条目信息泄露漏洞 |
| CVE-2026-98981 | 8.8 HIGH | Linux 内核命名空间 dentry 解挂载前未哈希漏洞 |
| CVE-2026-99042 | 8.4 HIGH | io_uring 24 字节 sockaddr_in6 过滤字段填充漏洞 |
| CVE-2026-98978 | 8.4 HIGH | Linux 命名空间 锁定挂载永不失效漏洞 |
| CVE-2026-99064 | 8.1 HIGH | CIPSO 缓存选项偏移调整漏洞 |
| CVE-2026-98968 | 8.1 HIGH | AMT 中继通用查询远程代码执行漏洞 |
| CVE-2026-98899 | 7.8 HIGH | Linux netfilter ipset 竞态条件漏洞 |
| CVE-2026-99018 | 7.8 HIGH | RISC-V 内核影子调用栈加载逻辑缺陷 |
| CVE-2026-99002 | 7.8 HIGH | vmwgfx 驱动用户空间 pitch 参数验证漏洞 |
| CVE-2026-99016 | 7.8 HIGH | RISC-V futex 用户指针未去标签原子访问漏洞 |
| CVE-2026-99051 | 7.8 HIGH | fsverity 信息结构释放延迟漏洞 |
| CVE-2026-99032 | 7.8 HIGH | Linux 内核 SMC 模块 信息泄露漏洞 |
| CVE-2026-98999 | 7.8 HIGH | Intel Xe DRM 驱动程序链接表项失效漏洞 |
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