CVE-2023-0386

README gcc -Wall exp.c pkg-config fuse --cflags --libs -o exp ./exp /tmp Vulnerability Analysis The theoretical knowledge in this article namespaces, overlay filesystem, fuse filesystem, etc. comes from ChatGPT. Vulnerability Overview Vulnerability ID: CVE-2023-0386 Vulnerable Product: Linux kern...

CVE-2023-0386

Installation make all How to use Start two terminals and in the first one type ./fuse ./ovlcap/lower ./gc In the second terminal type ./exp...

Astra Linux – Vulnerability in Linux

A issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, also known as CID-5d069dbe8aaf. The fusedogetattr function calls makebadinode in inappropriate situations, causing a system crash. NOTE: The original fix for this vulnerability was incomplete, and its...

CVE-2023-0386-OverlayFS

CVE-2023-0386 - OverlayFS / FUSE Original CVE source written by xkaneiki: https://github.com/xkaneiki/CVE-2023-0386/tree/main Rewritten so the exploit can be run in 1 shell original exploit requires 2 shells. Compile make all Create mount point for fuse filesystem mkdir -p /tmp/fusepwn/lower Star...

CVE-2022-1011

CVE-2022-1011 Fix link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0c4bcfdecb1ac0967619ee7ff44871d93c08c909 This vulnerability is mainly due to the asynchronous nature of splice, which allows the user-mode filesystem process server side to retain a piece of memor...

CLEANSTART-2026-WY70417 logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem

Security vulnerability affects the util-linux package. A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem...

Rocky Linux 8 [CIQ] Security Update: kernel-rt / kernel-rt-core / kernel-rt-debug / kernel-rt-debug-core / etc Multiple Vulnerabilities (crlsa-2023_1584)

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-20231584 advisory. kernel: stack overflow in doprocdointvec and procskipspaces CVE-2022-4378 ALSA: pcm: Move rwsem lock inside sndctlelemread to prevent UAF CVE-2023-0266...

Astra Linux – Vulnerability in Linux, Linux 5.10

A use-after-free flaw was discovered in the Linux kernel’s FUSE filesystem, where a user triggers the write function. This flaw allows a local user to gain unauthorized access to data from the FUSE filesystem, resulting in privilege escalation...

SUSE CVE-2026-68149

In the Linux kernel, the following vulnerability has been resolved: fs: preserve ACLDONTCACHE state in forgetcachedacl The ACLDONTCACHE state is meant to be a constant state for the inode for filesystems that want to opt out of posix acl caching. Commit facd61053cff1 "fuse: fixes after adapting t...

CVE-2026-68149

A flaw was found in the Linux kernel. The forgetcachedacl helper function, intended to manage Access Control List ACL caching, incorrectly invalidates the ACLDONTCACHE state. This can lead to a Fuse Filesystem in Userspace filesystem returning stale cached ACL values. Consequently, this could...

CVE-2026-68149

In the Linux kernel, the following vulnerability has been resolved: fs: preserve ACLDONTCACHE state in forgetcachedacl The ACLDONTCACHE state is meant to be a constant state for the inode for filesystems that want to opt out of posix acl caching. Commit facd61053cff1 "fuse: fixes after adapting t...

UBUNTU-CVE-2026-68149

In the Linux kernel, the following vulnerability has been resolved: fs: preserve ACLDONTCACHE state in forgetcachedacl The ACLDONTCACHE state is meant to be a constant state for the inode for filesystems that want to opt out of posix acl caching. Commit facd61053cff1 "fuse: fixes after adapting t...

CVE-2026-68149 fs: preserve ACL_DONT_CACHE state in forget_cached_acl()

In the Linux kernel, the following vulnerability has been resolved: fs: preserve ACLDONTCACHE state in forgetcachedacl The ACLDONTCACHE state is meant to be a constant state for the inode for filesystems that want to opt out of posix acl caching. Commit facd61053cff1 "fuse: fixes after adapting t...

PT-2026-69549

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the virtual file system VFS helper forget cached acl where it fails to preserve the ACL DONT CACHE state. This state is intended to be constant for inodes in filesyste...

AZL-93740 CVE-2026-64266 affecting package kernel for versions less than 6.6.145.2-1

In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before returning from fusereffolio fusereffolio unlocks the request but does not re-lock it before returning. fusechanabort can end the request and the async end callback eg fusewritepagefree can free the ar...

CVE-2026-8933: Local Privilege Escalation in Set-Capabilities snap-confine

The Qualys Threat Research Unit TRU has identified a Local Privilege Escalation LPE vulnerability in snap-confine CVE-2026-8933. This flaw allows an unprivileged local user to gain full root access on default installations of Ubuntu Desktop 24.04, 25.10, and 26.04. The issue stems from a security...

SUSE CVE-2026-53311

In the Linux kernel, the following vulnerability has been resolved: fuse: fix uninit-value in fusedentryrevalidate fusedentryrevalidate may be called with a dentry that didn't had -dtime initialised. The issue was found with KMSAN, where lookupopen calls dalloc, followed by drevalidate, as shown...

CVE-2026-53311

In the Linux kernel, the following vulnerability has been resolved: fuse: fix uninit-value in fusedentryrevalidate fusedentryrevalidate may be called with a dentry that didn't had -dtime initialised. The issue was found with KMSAN, where lookupopen calls dalloc, followed by drevalidate, as shown...

AZL-90761 CVE-2026-53167 affecting package kernel for versions less than 6.6.144.1-1

In the Linux kernel, the following vulnerability has been resolved: fuse: limit FUSENOTIFYRETRIEVE to uptodate folios FUSENOTIFYRETRIEVE must be limited to uptodate folios; !uptodate folios can contain uninitialized data. Since FUSENOTIFYRETRIEVE is intended to only return data that is already in...

SUSE-SU-2026:22421-1 Security update for the Linux Kernel (Live Patch 17 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-40.1 fixes various security issues The following security issues were fixed: - CVE-2026-23278: netfilter: nftables: always walk all pending catchall elements bsc1260907. - CVE-2026-31402: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache...