CVE-2020-27786-Kernel-Exploit

CVE-2020-27786 Kernel Exploit Details You can find full details and explaination here: https://1day.dev/notes/Linux-Kernel-n-day-exploit-development TL;DR The vulnerability is a Race Condition that causes a write Use-After-Free. The race window has been extended using the userfaultd technique...

CVE-2021-33909

CVE-2021-33909 Sequoia Writeup root@kitploit: gcc exploit.c -o exploit -lpthread -DBLOCKVIAUSERFAULTFD gcc exploit.hello.c -o exploit.hello -lpthread -lfuse -DFILEOFFSETBITS=64 root@kitploit: $ mkdir dir $ ./exploit $pwd/dir id...

kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

Important: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

RHEL 10 : kernel (RHSA-2026:69089)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:69089 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: RDMA/mana: Remove user...

CVE-2022-2602

CVE-2022-2602 This repository contains exploits for CVE-2022-2602. There are two versions of it: Exploit using userfaultfd technique. Exploit using inode locking technique. Enjoy! : LukeGix...

Important: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

RHEL 9 : kernel (RHSA-2026:67720)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:67720 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: RDMA/mana: Remove user...

Astra Linux – Vulnerability in Linux, Linux 5.10

A flaw after-free usage in the function scosocksendmsg of the Linux kernel’s HCI subsystem was discovered. This flaw allows a privileged local user to exploit it to crash the system or escalate their privileges on the system. This flaw triggers a race condition when the user calls ioct...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: The page is released in the error path to avoid BUGON. Consider the following sequence of events: 1. The userspace sends a UFFD ioctl, which ultimately calls shmemmfillatomicpte. We successfully account the blocks, a...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: userfaultfd: Fixes the checks for huge PMDs. Patch series “userfaultfd: fix races around pmdtranshuge check”, v2. The pmdtranshuge code in mfillatomic is incorrect in three different ways, depending on the kernel version: 1. T...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: The userfaultfdapi function has been fixed to return EINVAL as expected. Currently, if we request a feature that is not set in the kernel configuration, we will fail silently and return all available features. However, the manual...

kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

SUSE CVE-2026-72175

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: fix makeuffdwphugepte prot-update race Patch series "userfaultfd/pagemap: pre-existing fixes". These are pre-existing bug fixes that were carried at the front of the userfaultfd RWP working-set-tracking series up...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: 1. fs/proc/taskmmu: Fixed the race condition in makeuffdwphugepte where updates to the “Dirty” or “Accessed” status of a page might be lost when PAGEMAPSCAN writes-protects a HUGETLB PTE. 2. fs/proc/taskmmu: The...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: a race between writeprotect and exitmmap has been fixed. A race may occur when a process exits; its virtual memory addresses are removed by exitmmap, and at the same time, userfaultfdwriteprotect is called. This race...

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: mm/ksm: fixed the behavior of flag-dropping in ksmmadvise. Syzkaller discovered the following crash: kernel BUG 44.607039 ------------ cut here ------------ 44.607422 Kernel BUG at mm/userfaultfd.c:2067! 44.608148 Oops: invali...

Linux Distros Unpatched Vulnerability : CVE-2026-72175

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fs/proc/taskmmu: fix makeuffdwphugepte prot-update race Patch series userfaultfd/pagemap: pre- existing fixes. These are pre-existing bug fixes that were carrie...