CVE-2026-80668— Netfilter nf_conntrack 期望回收机制更新
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： netfilter: nf_conntrack_expect：使用 conntrack GC 来回收 expectations 该补丁将原本基于定时器（timer）API 的机制替换为基于垃圾收集器（GC worker）的方法，这一改变在许多其他子系统中已经实施。 具体而言，该补丁利用现有的 conntrack GC worker，遍历主 conntrack 条目本地维护的 expectations 列表，以清理已过期的 expectations。 主要技术细节如下：
影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | bffcaad9afdfe45d7fc777397d3b83c1e3ebffe5< 7ec786f4230c2a9b2eaf97a2d45368933b49d2b2 |
affected |
bffcaad9afdfe45d7fc777397d3b83c1e3ebffe5< b8b09dc2bf35a00d4e0556b5d6308c7b917ebda2 |
affected | ||
9e1196d27ef496f404c76f7a9d03761142d991c4 |
affected | ||
5e1c1d22268ae710c238342c8030c21daf298168 |
affected | ||
d52fa1fa7440676b8c238037a050ab008c22737f |
affected | ||
f338ced0473849c9f6ed0b77ca99f1aab5826787 |
affected | ||
497f99b26fffdc5635706d1b4811f1ed8ee21a5b |
affected | ||
6.1.176< 6.2 |
affected | ||
| … +8 条更多 | |||
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-80668 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
This patch replaces the timer API by GC worker approach for
expectations, as it already happened in many other subsystems.
Use the existing conntrack GC worker to iterate over the local list of
expectations in the master conntrack to reap expired expectations.
Check IPS_HELPER_BIT to run GC for expectations, set it on for nft_ct
expectation which nevers sets it. Hold the expectation spinlock while
iterating over the master conntrack expectation list to synchronize with
nf_ct_remove_expectations(). This also performs runtime packet path
garbage collection through the expectation insertion and lookup
functions while walking over one of the chains of the global expectation
hashtables. Unconfirmed conntrack entries are skipped since ct->ext can
be reallocated and dying are skipped since those will be gone soon.
Set on IPS_HELPER_BIT if the helper ct extension is added, then the new
GC worker does not need to bump the ct refcount to check if the ct->ext
helper is available.
This removes the extra bump on the refcount for expectation timers, this
allows to remove several nf_ct_expect_put() calls after the unlink,
after this update only refcount remains at 1 while on the expectation
hashes.
This patch implicitly addresses a race with the existing timer API
allowing an expectation to access a stale exp->master pointer which has
been already released when expectation removal loses races with an
expiring timer, ie. timer_del() reporting false.
Add a new NF_CT_EXPECT_DEAD flag to reap this expectation via GC. This
is needed by nf_conntrack_unexpect_related() which is called in error
paths to invalidate newly created expectations that has been added into
the hashes. These expectactions cannot be inmediately released as GC or
nf_ct_remove_expectations() could race to make it. On expectation
insert, the runtime GC reaps stale expectations before checking the
expectation limit set by policy.
Set current timestamp in nf_ct_expect_alloc(), then add the expectation
policy timeout (or custom timeout specified added on top of this) to
specify the expectation lifetime.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
受影响产品
二、漏洞 CVE-2026-80668 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-80668 的情报信息
请登录查看更多情报信息。
CVE-2026-80668 补丁与修复 (2)
同批安全公告 · Linux · 2026-08-28 · 共 135 条
| CVE-2026-80694 | 9.8 CRITICAL | MTK网络驱动 mtk_eth_soc 缺陷 |
| CVE-2026-80673 | 9.8 CRITICAL | NTFS 属性查找中前瞻条目越界读取漏洞 |
| CVE-2026-80634 | 9.8 CRITICAL | Netfilter flowtable 整数下溢漏洞 |
| CVE-2026-80674 | 9.8 CRITICAL | NTFS 文件系统属性列表验证与校验器增强 |
| CVE-2026-80630 | 9.8 CRITICAL | Linux 内核 net/sched 模块内存损坏漏洞 |
| CVE-2026-80617 | 9.8 CRITICAL | Linux 内核 airoha 驱动堆缓冲区溢出漏洞 |
| CVE-2026-80612 | 9.8 CRITICAL | Linux 内核 lwtunnel 封装前丢弃元数据 |
| CVE-2026-80714 | 9.8 CRITICAL | IPVS 同步连接标志处理缺陷 |
| CVE-2026-80609 | 9.8 CRITICAL | qede 驱动 cqe 越界检查修复 |
| CVE-2026-80681 | 9.8 CRITICAL | Linux Kernel 内核 Vxlan 远程代码执行漏洞 |
| CVE-2026-80600 | 9.8 CRITICAL | batman-adv 数据转发 缓冲区溢出漏洞 |
| CVE-2026-80671 | 9.3 CRITICAL | Linux内核 perf sched 缓冲区溢出漏洞 |
| CVE-2026-80693 | 9.3 CRITICAL | iDPF 中断向量寄存器数组填充越界 |
| CVE-2026-80684 | 9.3 CRITICAL | KVM s390 PCI AIBV 分配失败空指针解引用 |
| CVE-2026-80603 | 9.1 CRITICAL | Linux内核 netfilter IRC模块越界读取漏洞 |
| CVE-2026-80670 | 9.1 CRITICAL | Linux 内核 perf 工具 CPU 拓扑解析修复 |
| CVE-2026-80683 | 8.8 HIGH | Linux 蓝牙SCO套接字引用计数缺陷 |
| CVE-2026-80692 | 8.8 HIGH | Linux 蓝牙HCI同步连接回调竞态漏洞 |
| CVE-2026-80672 | 8.8 HIGH | NTFS 重启区长度检查 u16 截断修复 |
| CVE-2026-80633 | 8.8 HIGH | Linux内核 iommufd 竞态条件漏洞 |
显示前 20 条，共 135 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-80668
暂无评论