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 gcc exploit.c -o exploit -lpthread -DBLOCKVIAUSERFAULTFD gcc exploit.hello.c -o exploit.hello -lpthread -lfuse -DFILEOFFSETBITS=64 $ mkdir dir $ ./exploit $pwd/dir id...

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...

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-6.1, linux-6.12, linux-6.18

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: gate mustwait writability check on ptepresent userfaultfdmustwait and userfaultfdhugemustwait read the PTE without taking the page table lock and then apply ptewrite / hugeptewrite to it. These accessors decode bits...

Astra Linux – vulnerability in linux-6.12

In the Linux kernel, the following vulnerability has been resolved: mm/userfaultfd: fix hugetlb fault mutex hash calculation In mfillatomichugetlb, linearpageindex is used to calculate the page index for hugetlbfaultmutexhash. However, linearpageindex returns the index in PAGESIZE units, while...

CLSA-2024-1725876080 kernel: Fix of 45 CVEs

dmaengine: idxd: Fix possible Use-After-Free in irqprocessworklist CVE-2024-40956 - userfaultfd: fix a race between writeprotect and exitmmap CVE-2021-47461 - netfilter: nftables: use timestamp to check for set element timeout CVE-2024-27397 - x86/sev: Harden VC instruction emulation somewhat...

Astra Linux - vulnerability in linux

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: release page in error path to avoid BUGON Consider the following sequence of events: 1. Userspace issues a UFFD ioctl, which ends up calling into shmemmfillatomicpte. We successfully account the blocks, we...

Astra Linux – vulnerability in linux-5.15

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

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...

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 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...

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...