CVE-2023-3338-DECPwn

DECPwn 自身のDECnet脆弱性とヌルページマッピングを有効にした状態で、さまざまなLinuxカーネルエクスプロイト技術を練習します。 シナリオ すべて無効 : qemu-system-x8664 -append "nosmap nosmep nopti nokaslr" コード実行はユーザーランドのoutput関数にリダイレクトされ、commitcredspreparekernelcred0を呼び出します。 システムコールフッキング syscalltable 内の mkdir システムコールハンドラアドレスを、シナリオ1のものと類似した関数と置き換えます。 SMEPとKPTI有効...

SUIDGuard

SUIDGuard - 一个为 OS X 添加缓解措施以增加漏洞利用难度的内核扩展 版权所有 c Stefan Esser / SektionEins GmbH, 2015。保留所有权利。 [email protected] - https://www.sektioneins.de/ 官方网站 如果您是从媒体报道来到这里，请查看官方网站 https://www.suidguard.com 关于 SUIDGuard 是一个 TrustedBSD 内核驱动程序，它实现了多种缓解措施，以防范操作系统中通常被漏洞利用所滥用的弱点。 保护 SUID/SGID root 二进制文件免受...

CVE-2011-1237

CVE-2011-1237 これは、2013年に作成されたWindows 7向けのCVE-2011-1237の古いPOCです。 この脆弱性はTarjei Mandt（@kernelpool）によって発見され、彼の論文 Kernel Attacks through User-Mode Callbacks で説明されています。 このPOCではいくつかの値がハードコードされており、Nullページを呼び出しますが、これはもはや機能しません。このエクスプロイトについては、私の講演 A Look into the Windows Kernel で説明しています。...

CVE-2026-68454

In the Linux kernel KVM s390 PCI implementation, CVE-2026-68454 arises from improper handling when a guest registers IRQs without a summary bit: the GAITE stores a invalid address (virt_to_phys(page_address(NULL))) instead of 0 for the guest AISB. Root cause is memory address handling in this pat...

DEBIAN-CVE-2026-32738

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 792-byte HEIF sequence file with samplesperchunk=0 in the stsc box causes an unsigned integer underflow in the Chunk constructor mlastsample = 0 + 0 - 1 = UINT32MAX, mapping all samples to an empty...

PT-2025-49425

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the virtio-net component of the Linux kernel related to the handling of received packet lengths in large packets. A change introduced by commit 4959aebba8c0 altered how...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that stems from improper receive length checking, which could lead to a null page pointer dereference...

Linux Distros Unpatched Vulnerability : CVE-2025-38195

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - LoongArch: Fix panic caused by NULL-PMD in hugepteoffset ERROR INFO: CPU 25 Unable to handle kernel paging request at virtual address 0x0 ... Call Trace:...

CVE-2024-56612

In the Linux kernel, the following vulnerability has been resolved: mm/gup: handle NULL pages in unpinuserpages The recent addition of "pofs" pages or folios handling to gup has a flaw: it assumes that unpinuserpages handles NULL pages in the pages array. That's not the case, as I discovered when...

Unspecified vulnerability in Linux kernel (CNVD-2025-01681)

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from an issue with the handling of NULL pages by unpinuserpages in the mm/gup subsystem. No details of the...

CVE-2024-56612

In the Linux kernel, the following vulnerability has been resolved: mm/gup: handle NULL pages in unpinuserpages The recent addition of "pofs" pages or folios handling to gup has a flaw: it assumes that unpinuserpages handles NULL pages in the pages array. That's not the case, as I discovered when...

CVE-2024-56612

CVE-2024-56612 describes a Linux kernel vulnerability in mm/gup where unpin_user_pages() may dereference NULL pages in the pages** array when using pofs. The flaw was triggered by a configuration like x86 with numa=fake=2 movablecore=4G on Linux 6.12, leading to a kernel NULL pointer dereference ...

CVE-2024-56612 mm/gup: handle NULL pages in unpin_user_pages()

In the Linux kernel, the following vulnerability has been resolved: mm/gup: handle NULL pages in unpinuserpages The recent addition of "pofs" pages or folios handling to gup has a flaw: it assumes that unpinuserpages handles NULL pages in the pages array. That's not the case, as I discovered when...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from an issue with the handling of NULL pages by unpinuserpages in the mm/gup subsystem. No details of the...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...

CVE-2021-47463

CVE-2021-47463 concerns a Linux kernel NULL pointer dereference in mm/secretmem during GUP operations. The issue arises from dereferencing page->mapping without ensuring it is non-NULL as a page mapping can be nulled while gup() runs (e.g., by reclaim or truncation). A fix was implemented to ...

CVE-2021-47463 mm/secretmem: fix NULL page->mapping dereference in page_is_secretmem()

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page-mapping dereference in pageissecretmem Check for a NULL page-mapping before dereferencing the mapping in pageissecretmem, as the page's mapping can be nullified while gup is running, e.g. by reclaim or...