EUVD-2026-48932

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix chown/chgrp with SMB3 POSIX Extensions Ownership chown and group chgrp modifications were being ignored when mounting with SMB3 POSIX Extensions unless CIFSMOUNTCIFSACL or CIFSMOUNTMODEFROMSID were also explicitly...

CVE-2026-64388

Summary: CVE-2026-64388 affects the Linux kernel SMB client when using SMB3 POSIX Extensions, where chown/chgrp updates could be ignored unless CIFS_MOUNT_CIFS_ACL or CIFS_MOUNT_MODE_FROM_SID are also set. The root cause is a missing check for posix_extensions in cifs_setattr_nounix() during UID/...

RHSA-2026:43420 Red Hat Security Advisory: acl security update

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RLSA-2026:42736 Important: acl security update

Access Control Lists ACLs are used to define fine-grained discretionary access rights for files and directories. The acl packages contain the getfacl and setfacl utilities needed for manipulating access control lists. Security Fixes: acl: Symlink traversal privilege escalation via libacl function...

acl: Symlink traversal privilege escalation via libacl functions

A flaw was found in the acl package, specifically within its libacl pathname-based functions. A local attacker could exploit this vulnerability by using a symbolic link to replace a pathname component. This could allow the attacker to redirect access control list ACL read or write operations to...

UBUNTU-CVE-2026-15812

A vulnerability was found in the internal Access Control List ACL su...

acl: TOCTOU Symlink Traversal via getfacl/setfacl

A time-of-check to time-of-use TOCTOU race condition vulnerability was found in acl. By replacing a pathname component with a symbolic link between a security check and subsequent file operations, an attacker can redirect file access control list operations. This occurs when privileged processes...

acl: Symlink traversal privilege escalation via libacl functions

A flaw was found in the acl package, specifically within its libacl pathname-based functions. A local attacker could exploit this vulnerability by using a symbolic link to replace a pathname component. This could allow the attacker to redirect access control list ACL read or write operations to...

CVE-2026-64138

A flaw was found in the ksmbd module of the Linux kernel. This vulnerability arises from improper validation of Security Identifiers SIDs within the NT Security Descriptor smbntsd during Access Control List ACL inheritance. An attacker could exploit this to bypass intended security restrictions,...

CVE-2026-15812

A vulnerability was found in the internal Access Control List ACL subsystem of kronosnet Version affected: = 1.34. When the framework is explicitly configured to manage dynamic links accepting network traffic from any IP address without network payload encryption, the validation architecture...

CVE-2026-15812 Kronosnet: kronosnet: access control list bypass via link id spoofing on unencrypted dynamic links

A vulnerability was found in the internal Access Control List ACL subsystem of kronosnet Version affected: = 1.34. When the framework is explicitly configured to manage dynamic links accepting network traffic from any IP address without network payload encryption, the validation architecture...

CVE-2026-15812

A vulnerability was found in the internal Access Control List ACL subsystem of kronosnet Version affected: = 1.34. When the framework is explicitly configured to manage dynamic links accepting network traffic from any IP address without network payload encryption, the validation architecture...

CVE-2026-15812

CVE-2026-15812 affects kronosnet (

acl security update

2.4.0-1 - rebase to 2.4.0 to fix the following CVEs: - CVE-2026-54369 - Symlink traversal privilege escalation via libacl functions RHEL-186106 - CVE-2026-54370 - TOCTOU Symlink Traversal via getfacl/setfacl RHEL-186207...

acl-2.4.0-1.1 on GA media (moderate)

acl-2.4.0-1.1 on GA media Announcement ID: openSUSE-SU-2026:11312-1 Rating: moderate Cross-References: CVE-2026-54369 CVE-2026-54370 CVE-2026-54371 CVSS scores: CVE-2026-54369 SUSE : 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-54369 SUSE : 8.8...

CVE-2026-53396

A flaw was found in the Linux kernel's Network File System NFS daemon nfsd within the nfsd4createfile function. This vulnerability allows a remote attacker to cause a denial of service DoS by repeatedly triggering a memory leak of posixacl allocations. The leak occurs when a client attempts to...

SUSE CVE-2026-53395

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix dead ACL conflict guard in nfsd4create nfsd4create steals create-crdpacl/crpacl into the local nfsdattrs via the designated initializer, then immediately sets the source pointers to NULL. The subsequent conflict guard...

EUVD-2026-45823

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate SID in parent security descriptor during ACL inheritance Introduce smbvalidatentsdsid helper to safely validate Owner SID and Group SID inside the NT Security Descriptor smbntsd retrieved from the parent directory...

CVE-2026-63814

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate ACL entry sizes in f2fsaclfromdisk f2fsaclcount only validates the aggregate ACL xattr length. A malformed ACL can still place ACLUSER or ACLGROUP in a slot that only contains struct f2fsaclentryshort bytes, and...

CVE-2026-53395

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix dead ACL conflict guard in nfsd4create nfsd4create steals create-crdpacl/crpacl into the local nfsdattrs via the designated initializer, then immediately sets the source pointers to NULL. The subsequent conflict guard...