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,...

SUSE CVE-2026-53390

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

CVE-2026-64138

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-2026-64138 ksmbd: validate SID in parent security descriptor during ACL inheritance

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-2026-64138

CVE-2026-64138 affects the ksmbd component in the Linux kernel, addressing a vulnerability in ACL inheritance where the Owner/Group SIDs from the NT Security Descriptor could be unsafe when retrieved from a parent directory. The fix introduces the helper smb_validate_ntsd_sid() to safely validate...

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-2026-64138 ksmbd: validate SID in parent security descriptor during ACL inheritance

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-2026-53390

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

CVE-2026-53390 ksmbd: fix out-of-bounds read in smb_check_perm_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

CVE-2026-53390 ksmbd: fix out-of-bounds read in smb_check_perm_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

EUVD-2026-45512

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

CVE-2026-53390

The CVE-2026-53390 issue affects ksmbd in the Linux kernel, where an out-of-bounds heap read can be triggered by crafted ACEs in SMB DACLs. Root cause: smb_check_perm_dacl() validates ACE header and caps sid.num_subauth but did not ensure ace->size is large enough to contain num_subauth sub-au...

CVE-2026-53390

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

PT-2026-61095

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An out-of-bounds read exists in the ksmbd component. The smb check perm dacl function fails to verify if the ace-size is sufficient to contain the number of sub-authorities specified by...

CVE-2025-27463

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. The Windows PV drivers expose various facilities to userspace. Several of these have no security descriptor, and are therefore fully accessible to unprivileged users. The...

CVE-2025-27464 WinPVDrivers: Excessive permissions on user-exposed devices

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. The Windows PV drivers expose various facilities to userspace. Several of these have no security descriptor, and are therefore fully accessible to unprivileged users. The...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: A out-of-bounds error in parsesecdesc has been fixed. If osidoffset, gsidoffset, and dacloffset can be greater than smbntsdstruct.size. If they are smaller, it may lead to an out-of-bounds situation. Additionally, when...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: client: Use kzalloc to zero-initialize the security descriptor buffer. The commit 62e7dd0a39c2d “smb: common: change the data type of numaces to le16” involves splitting the le32 numaces field in the struct smbacl structure...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Validated the length of inherited ACE SIDs. smbinheritdacl iterates through the parent directory DACL loaded from the security descriptor xattr. It verifies that each ACE contains the correct SID header before using it,...

EUVD-2026-37803

In SignalRGB versions prior to 1.3.7.0, the \.\SignalIo device object is created without an explicit SDDL security descriptor and without FILEDEVICESECUREOPEN. This results in overly permissive default access control, allowing any authenticated local user to obtain a handle to the device and issu...