CVE-2026-31431

CVE-2026-31431 — Copy Fail 732 字节，通杀主流 Linux 发行版，直达 root CVE-2026-31431（Copy Fail）是 Linux 内核 authencesn 加密模板中的一个逻辑漏洞。它允许非特权本地用户对系统上任意可读文件的页缓存（page cache）进行确定性的、可控的 4 字节写入。 概述 CVE 编号: CVE-2026-31431 类型: 本地提权 / 容器逃逸 影响范围: 启用 CONFIGCRYPTOAUTHENC 的 Linux 内核（2017 年以来几乎所有主流发行版） 发现者: Xint Code 研究团队，Theo...

CVE-2026-31431-Copy-Fail-add-arm64

漏洞概述 项目| 内容 ---|--- CVE 编号| CVE-2026-31431 漏洞名称| Copy Fail 漏洞类型| Linux 内核本地提权 LPE CVSS 3.1 评分| 7.8 HIGH CWE| CWE-669: Incorrect Resource Transfer Between Spheres 影响范围| 2017 年至 2026 年 4 月间构建的所有 Linux 内核 CISA KEV| 已列入，截止修复日期 2026-05-15 公开时间| 2026-04-29 漏洞原理 2017 年内核在 algifaead...

cve-2026-31431

CVE-2026-31431（Copy Fail）工具集 本仓库包含 Linux algifaead / authencesn 页缓存 scratch-write 漏洞 CVE-2026-31431 的检测器和 PoC。 披露文章：https://xint.io/blog/copy-fail-linux-distributions 授权说明 仅可在你拥有或已获得明确授权的主机上使用。检测器是无破坏性的，只操作临时目录中的 sentinel 文件；PoC 和 LPE 会修改内存中的页缓存状态，属于真实的本地提权技术，未授权运行通常是违法行为。 漏洞概述 algifaead 会以原地方式执行...

CopyFile_CVE-2026-31431

CopyFileCVE-2026-31431 复制错误（CVE-2026-31431）——本地权限提升漏洞利用 Linux 内核 authencesn AEAD 模板中的一个逻辑错误，允许无特权用户向任何可读文件的页缓存中写入 4 个受控字节。 所提供的 Python 脚本会在内存中破坏 /usr/bin/su，并生成一个 root shell。 漏洞概述 CVE-2026-31431 是 Linux 内核加密子系统中的一个漏洞，具体位于 authencesn（扩展序列号 AEAD）模板与 AFALG 套接字接口及 splice 系统调用相结合的部分。 根本原因 ：authencesn...

copy-fail-cve-2026-31431-linux-kernel-page-cache-lpe

Copy Fail CVE-2026-31431 - Vulnerability Checker Conceptual validation script for CVE-2026-31431 "Copy Fail" — a Linux kernel local privilege escalation via algifaead page-cache write. Vulnerability CVE-2026-31431 is a logic bug in the Linux kernel's authencesn AEAD template. When combined with...

CVE-2026-31431-C

copy-fail CVE-2026-31431 Copy Fail C language PoC, logically aligned with the original Python exploit theori-io/copy-fail-CVE-2026-31431. For authorized security research and experimental environments only. Do not use on unauthorized systems. Brief Principle In Linux AFALG,...

Detection-Tool-Kit-for-CVE-2026-31431

copyfail-detect Detection toolkit for CVE-2026-31431 "Copy Fail", a Linux kernel local privilege escalation technique that corrupts page-cache data without changing the file on disk. Why This Exists Copy Fail can bypass traditional file integrity monitoring because the on-disk file is not modifie...

Exploit for Integer Overflow or Wraparound in Linux Linux_Kernel

Proof of Concept for a Linux kernel pr...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mm: Use memallocnofssave in pagecacheraorder. See commit f2c817bed58d “mm: Use memallocnofssave in readahead”, ensure that pagecacheraorder does not attempt to reclaim file-backed pages too often, as this can lead to a deadlock...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Nilfs2: Fixed potential deadlocks caused by newly created symlinks. Syzbot reported that pagesymlink, called by nilfssymlink, triggers memory reclamation involving the filesystem layer. This can lead to circular lock dependencies...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net: skbuff: The SKBFLSHAREDFRAG bit was not properly propagated through the frag-transfer helpers. Two frag-transfer helpers pskbcopyfclone and skbshift fail to propagate the SKBFLSHAREDFRAG bit in skbshinfo-flags when moving...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: hugetlbfs: Do not delete the error page from the page cache. This change is very similar to the change made for shmem 1. It addresses the same issue, but for the HugeTLBFS mechanism instead. Currently, when a poisoned HugeTLB pag...

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-2026-89642

A flaw was found in the Linux kernel's Common Internet File System CIFS implementation. When a client extends a file, the cifssetsize function fails to properly zero out the newly extended portion of the page cache. This oversight can lead to stale data from the client's memory being written back...

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 6.6.152.1-1

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...

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...