204 matches found
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-2021-41091
CVE-2021-41091 This exploit offers an in-depth look at the CVE-2021-41091 security vulnerability and provides a step-by-step guide on how to utilize the exploit script to achieve privilege escalation on a host. Vulnerability Summary CVE-2021-41091 is a flaw in Moby Docker Engine that allows...
Vulnerable-Docker-Engine
CVE-2021-41091 This exploit offers an in-depth look at the CVE-2021-41091 security vulnerability and provides a step-by-step guide on how to utilize the exploit script to achieve privilege escalation on a host. Vulnerability Summary CVE-2021-41091 is a flaw in Moby Docker Engine that allows...
UBUNTU-CVE-2026-95702
Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The...
CVE-2026-95702
A flaw was found in Google gVisor's Virtual File System VFS. A local attacker with standard container privileges can exploit this vulnerability to achieve arbitrary code execution within the host sentry process. By improperly releasing a backing memory file multiple times from an in-sandbox overl...
CVE-2023-0386-go-poc
Go PoC of CVE-2023-0386 ./main /tmp/fuse Will run the program and create a fuse mount on "/tmp/fuse" directory. Expects you've compiled the shell in the root directory with a name of "shell" by default. After you've run the program, there should be an executable binary in the "/tmp/ovlmerged/"...
Linux Distros Unpatched Vulnerability : CVE-2026-95702
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to...
DEBIAN-CVE-2026-95702
Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The...
EUVD-2026-95816
Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The...
CVE-2026-95702: Use After Free
Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The...
Astra Linux – Vulnerability in Linux 5.15
In the Linux kernel, the following vulnerability has been resolved: ovl: fixed null pointer dereference in ovlgetaclrcu The following processes are involved: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlget inodeacl...
Astra Linux – Vulnerability in Linux, Linux 5.10
In the Linux kernel, the following vulnerabilities have been resolved: ovl: fixed the warning in ovlcreatereal Syzbot triggered the following warning in ovlworkdircreate - ovlcreatereal: if !err && WARNON!newdentry-d inode The reason is that the cgroup2 filesystem returns from mkdir without...
Astra Linux – Vulnerability in Linux
Local privilege escalation vulnerability in Ubuntu Kernels overlayfs: Ovlcopyupmeta inodedata function skips permission checks when calling ohldosetxattr on Ubuntu kernels...
Astra Linux – Vulnerabilities in Linux-6.1, Linux-5.15, Linux-5.10
In the Linux kernel, the following vulnerabilities have been resolved: ovl: Fixed a UAF Use-After-Free issue in ovldentryupdatereval by moving the dput function within ovllinkup. The issue arose because the dputupper function was called before ovldentryupdatereval, while upper-dflags was still...
Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15
A flaw was discovered in the Linux kernel, where unauthorized access to the execution of the setuid file with specific capabilities was detected within the OverlayFS subsystem of the Linux kernel. This issue occurs when a user copies a file with capabilities from a nosuid mount to another mount...
Astra Linux – Vulnerability in Linux 6.1
On Ubuntu kernels that carry both c914c0e27eb0 and “UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs. xattrs”, a non-privileged user may set privileged extended attributes on mounted files, causing those attributes to be applied to the upper files without the appropriate...
Astra Linux – Vulnerability in Linux, Linux 5.10
A race condition accessing file objects in the Linux kernel OverlayFS subsystem was identified. This occurs when users renames files using OverlayFS in a specific manner. A local user could exploit this flaw to cause the system to crash...
Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10
In the Linux kernel, the following vulnerability has been resolved: ovl: Use the “buf” flexible array as the destination for memcpy. The “buf” flexible array must be used as the destination for memcpy to avoid false positive run-time warnings caused by the recent FORTIFYSOURCE hardening measures:...
Unity Linux 20.1050e Security Update: kernel (UTSA-2026-102056)
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-102056 advisory. In the Linux kernel, the following vulnerability has been resolved: btrfs: tracepoints: get correct superblock from dentry in event btrfssyncfile If overlay is used ...
kernel: selinux: fix overlayfs mmap() and mprotect() access checks
A flaw was found in the Linux kernel's SELinux security module when handling overlayfs. The existing security model for overlayfs does not properly enforce access controls for mmap and mprotect operations. This oversight could allow a local attacker to bypass intended security policies, potential...