The vulnerability of the ovl_permission() function in the fs/overlayfs/inode.c file of the Overlayfs file system in the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the ovlpermission function in the fs/overlayfs/inode.c file of the Overlayfs file system in the Linux operating system is related to the dereferencing of the NULL pointer. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000640)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000640 advisory. fs/overlayfs/copyup.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service dentry reference le...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003127)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003127 advisory. The overlayfs implementation in the Linux kernel through 4.5.2 does not properly restrict the mount namespace, which allows local users to gain privileges by mountin...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001828)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001828 advisory. fs/overlayfs/copyup.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service dentry reference le...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002135)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002135 advisory. fs/overlayfs/copyup.c in the Linux kernel before 4.2.6 uses an incorrect cleanup code path, which allows local users to cause a denial of service dentry reference le...

ROS-20260114-7329

A vulnerability in the ovlencoderealfh fs/overlayfs/copyup.c and showmarkfhandle fs/notify/fdinfo.c functions of the Linux operating system kernel is related to a flaw in the use of assert. Exploitation of the vulnerability allows an attacker to cause a denial of service...

SUSE CVE-2023-54313

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

EUVD-2023-60491

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

CVE-2023-54313

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

CVE-2023-54313

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

UBUNTU-CVE-2023-54313

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

CVE-2023-54313 ovl: fix null pointer dereference in ovl_get_acl_rcu()

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

CVE-2023-54313 ovl: fix null pointer dereference in ovl_get_acl_rcu()

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

CVE-2023-54313

In the Linux kernel, the following vulnerability has been resolved: ovl: fix null pointer dereference in ovlgetaclrcu Following process: P1 P2 pathopenat linkpathwalk maylookup inodepermissionrcu ovlpermission aclpermissioncheck checkacl getcachedaclrcu ovlgetinodeacl realinode =...

CVE-2023-53856

In the Linux kernel, the following vulnerability has been resolved: of: overlay: Call ofchangesetinit early When ofoverlayfdtapply fails, the changeset may be partially applied, and the caller is still expected to call ofoverlayremove to clean up this partial state. However, ofoverlayapply calls...

CVE-2023-53856

In the Linux kernel, the following vulnerability has been resolved: of: overlay: Call ofchangesetinit early When ofoverlayfdtapply fails, the changeset may be partially applied, and the caller is still expected to call ofoverlayremove to clean up this partial state. However, ofoverlayapply calls...

Linux Distros Unpatched Vulnerability : CVE-2025-40237

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fs/notify: call exportfsencodefid with sumount Calling intotifyshowfdinfo on fd watching an overlayfs inode, while the overlayfs is being unmounted, can lead to...

EUVD-2025-201222

In the Linux kernel, the following vulnerability has been resolved: fs/notify: call exportfsencodefid with sumount Calling intotifyshowfdinfo on fd watching an overlayfs inode, while the overlayfs is being unmounted, can lead to dereferencing NULL ptr. This issue was found by syzkaller. Race...

CVE-2025-40237 fs/notify: call exportfs_encode_fid with s_umount

In the Linux kernel, the following vulnerability has been resolved: fs/notify: call exportfsencodefid with sumount Calling intotifyshowfdinfo on fd watching an overlayfs inode, while the overlayfs is being unmounted, can lead to dereferencing NULL ptr. This issue was found by syzkaller. Race...

EUVD-2025-150374

In the Linux kernel, the following vulnerability has been resolved: Squashfs: reject negative file sizes in squashfsreadinode Syskaller reports a "WARNING in ovlcopyupfile" in overlayfs. This warning is ultimately caused because the underlying Squashfs file system returns a file with a negative...