OVSwrap

OVSwrap CVE-2026-64531 Writeup !WARNING 本 PoC 仅用于帮助防御者、维护者以及获得授权的安全团队，在他们拥有或明确获准测试的系统上验证补丁、缓解措施、检测规则和暴露面。 您全权负责确保您对此材料的使用是合法、经授权的、可控的，并且在隔离的测试环境中进行。 !WARNING 本 PoC 具有破坏性。 一旦成功，它会破坏内核中存活的凭据，修改 /etc/sudoers.d 或 /etc/sudoers，打开一个 root shell，并留下分离的进程和损坏的 OVS 状态以避开不安全的清理。...

CVE-2026-97612

The Linux kernel is vulnerable to a memory corruption issue in the MPLS stack. The skb_mpls_push() function records a pre-encapsulation network header but skb_mpls_pop() fails to clear it when the last label is popped. This allows Open vSwitch to re-push MPLS onto a packet where the inner_network...

CVE-2026-97612 net: mpls: clear inner_protocol when the last label is popped

In the Linux kernel, the following vulnerability has been resolved: net: mpls: clear innerprotocol when the last label is popped skbmplspush records the pre-encapsulation network header once, gated on !skb-innerprotocol. skbmplspop never clears that record, so it outlives the encapsulation it...

CVE-2026-64531

CVE-2026-64531 — OVSwrap Linux 内核 Open vSwitch 模块本地提权普通用户 → rootPoC。利用 16 位 nlalen 字段的整数回绕,从普通用户 一路提到 root 。 漏洞简述 OVS 生成的嵌套 action 流超过 65535 字节时,16 位 nlalen 字段发生回绕。攻击者仅在私有用户/网络命名空间内持有 CAPNETADMIN 即可构造超长 CLONE action,使内核解析器落入攻击者控制的 conntrack 数据,进而获得任意内核读 与逐字递减 原语,最终篡改自身凭据提权到 root。 该 bug 源于一个存在了 13...

ovswrap-poc

ovswrap-poc CVE-2026-64531 OVSwrap PoC - Linux 内核 Open vSwitch LPE；用于补丁验证和安全研究...

CVE-2026-97612

In the Linux kernel, the following vulnerability has been resolved: net: mpls: clear innerprotocol when the last label is popped skbmplspush records the pre-encapsulation network header once, gated on !skb-innerprotocol. skbmplspop never clears that record, so it outlives the encapsulation it...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

Detection-and-Mitigation-for-CVE-2022-2639

Detection-and-Mitigation-for-CVE-2022-2639 描述 Open vSwitch 内核模块允许在所选网络设备上对流级数据包处理进行灵活的用户空间控制。它可用于实现普通以太网交换机、网络设备绑定、VLAN 处理、网络访问控制、基于流的网络控制等。如果此内核模块未在使用中，建议禁用它以防止攻击。 安装 root@kitploit: wget https://github.com/EkamSinghWalia/Detection-and-Mitigation-for-CVE-2022-2639.git 使用 root@kitploit:...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

kernel: net: tun: bound receive headroom

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tungetuser function when processing oversized headroom requests. This can occur if Open vSwitch OVS propagates an excessively large headroom request to the TUN or TAP device. Successful...

CVE-2026-64531

🔥 CVE-2026-64531 — OVSwrap Linux 内核 Open vSwitch 内存损坏 🩸 漏洞概述 CVE-2026-64531 是一个影响 Linux 内核 Open vSwitch OVS 网络子系统的安全漏洞。 该缺陷存在于 Netlink 嵌套属性 的处理过程中，超大的动作结构可以绕过大小限制，并可能触发不安全的内核内存操作。 ⚠️ 成功利用该漏洞可能导致 内核崩溃、拒绝服务或可能的权限提升 。 🧬 技术信息 🏷️ 字段| 📌 详情 ---|--- CVE| CVE-2026-64531 平台| Linux 内核 组件| Open vSwitch 文件|...

ovswrap

OVSwrap — Linux 内核 Open vSwitch 数据路径溢出跟踪站点 OVSwrap 补丁状态跟踪器的源文件：一个单页站点，记录哪些发行版已为 Linux 内核中的 Open vSwitch 数据路径溢出问题发布了修复。 事实所在 关于该漏洞的一切——CVE 编号、受影响和已修复版本、上游修复提交、发现与公开致谢，以及当前各发行版的补丁状态——均属于跟踪页面，而非本 README： 渲染页面： https://kimmo.cloud/ovswrap/ 源文件： site/content/index.md 编辑该文件；此仓库中的其他内容均为构建基础设施。...

OVSwrap-CVE-2026-64531-Mitigation-Tool

OVSwrap CVE-2026-64531 缓解工具 一个简单的脚本，用于检测并缓解影响 Open vSwitch 内核模块的 OVSwrap 漏洞。 功能特性 检测易受攻击的 Open vSwitch 模块 确定模块是否已加载 阻止自动加载 安全移除模块 验证缓解状态 显示 KernelCare 信息 安装 root@kitploit: git clone https://github.com/mahfuzreham/OVSwrap-CVE-2026-64531-Mitigation-Tool.git cd OVSwrap-CVE-2026-64531-Mitigation-Tool...