dirtyfrag

Dirty Frag：通用 Linux 本地提权漏洞 摘要 本文档描述了由 Hyunwoo Kim @v4bel 首次发现并报告的 Dirty Frag 漏洞类，该漏洞类通过串联 xfrm-ESP 页面缓存写入（CVE-2026-43284） 和 RxRPC 页面缓存写入（CVE-2026-43500） 漏洞，可在主流 Linux 发行版上获得 root 权限。 Dirty Frag 是扩展了 Dirty Pipe 和 Copy Fail 所属错误类的案例。由于它是一个不依赖时间窗口的确定性逻辑漏洞，因此无需竞态条件，漏洞利用失败时内核不会崩溃，且成功率极高。...

copy-fail-checker

Copy Fail Checker — CVE-2026-31431 依存関係が少なく軽量な Bash スクリプトで、Linux システムが Copy Fail ローカル権限昇格脆弱性（CVE-2026-31431）にさらされているかどうかを確認します。 このスクリプトは 読み取り専用 です。脆弱性を悪用することはなく、カーネルモジュールをロードすることも、システムを変更することもありません。 Copy Fail とは Copy Fail は、Linux カーネルの authencesn AEAD 暗号テンプレートにおける論理バグであり、ユーザー空間から...

CVE-2026-43284

🚨 CVE-2026-43284 - Dirty Frag 🚨 Escalada local de privilegios universal en el kernel de Linux 📋 Resumen Dirty Frag también conocido como Copy Fail 2 es una vulnerabilidad de escalada local de privilegios de alto impacto en el kernel de Linux. Permite que un usuario local sin privilegios obtenga...

CVE-2022-22706-poc

CVE-2022-22706 - 页缓存写入 Arm Mali GPU 驱动会将已固定为只读的页面以 CPU 可写映射的形式交给用户空间， 因此非特权进程可以获得一个可写别名，指向某个它只能以 ORDONLY 打开的文件 背后的页缓存。 exploit.c 会清空 /etc/passwd 页缓存中 root 的密码字段，并执行 su root。磁盘上的文件从未被修改。 针对本仓库中的驱动树和 QEMU 目标的 PoC（malikbase r35p0-01eac0 ， CONFIGMALINOMALI=y，x8664 GKI 5.15）。在虚拟机中运行它。 漏洞...

DIRTYFAIL

DIRTYFAIL Copy Fail および Dirty Frag Linux ページキャッシュ書き込み脆弱性ファミリーのための統合検出器および PoC ハーネス。 ██████╗ ██╗██████╗ ████████╗██╗ ██╗███████╗ █████╗ ██╗██╗ ██╔══██╗██║██╔══██╗╚══██╔══╝╚██╗ ██╔╝██╔════╝██╔══██╗██║██║ ██║ ██║██║██████╔╝ ██║ ╚████╔╝ █████╗ ███████║██║██║ ██║ ██║██║██╔══██╗ ██║ ╚██╔╝ ██╔══╝...

CVE-2026-43284

Dirty Frag: 汎用Linux LPE 概要 本書では、Hyunwoo Kim @v4bel によって発見・報告された Dirty Frag 脆弱性クラスについて説明します。xfrm-ESP Page-Cache Write CVE-2026-43284 と RxRPC Page-Cache Write CVE-2026-43500 を連鎖させることで、攻撃者は主要な Linux ディストリビューション上で root に昇格できます。 Dirty Frag は Dirty Pipe や Copy Fail...

CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

UBUNTU-CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

CVE-2026-89487

A flaw was found in openvswitch in the Linux kernel. This vulnerability occurs when the queueuserspacepacket function incorrectly modifies a shared network packet buffer by stripping a critical flag. This action can lead to an unprivileged page-cache write, allowing a local attacker to modify dat...

Linux Distros Unpatched Vulnerability : CVE-2026-89487

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message users...

cve-2026-31431

CVE-2026-31431 — Linux 内核 algifaead “复制失败”：分析 针对 CVE-2026-31431 （CVSS 3.1 7.8 高危 ， AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H）的安全研究：AFALG AEAD 接口链中的三个可组合设计 缺陷串联成一次确定性、无竞态的 4 字节页缓存写入，可写入任意可读文件的任意偏移 ——磁盘副本保持干净，因此磁盘上的校验和看不到任何异常。公开漏洞利用（“复制失败”，Theori/Xint）以 732 字节的 Python 将其转化为本地提权（LPE）；该缺陷存在于 2017 年至 2026...

DEBIAN-CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

AZL-100568 CVE-2026-89487 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

EUVD-2026-76393

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

CVE-2026-89487 openvswitch: only skb_tx_error() a packet we are about to drop

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

CVE-2026-89487 openvswitch: only skb_tx_error() a packet we are about to drop

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

CVE-2026-89487

CVE-2026-89487 affects the openvswitch subsystem in the Linux kernel. The bug resides in queue_userspace_packet(), whose error path calls skb_tx_error() on a packet that is still being forwarded through remaining flow actions. This call strips SKBFL_SHARED_FRAG from the live skb via skb_zcopy_cle...

CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

PT-2026-90203

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skb tx error a packet we are about to drop queue userspace packet borrows the packet skb -- it only copies it into a private netlink message user skb and does not own it; on return do execute actions keeps...