CVE-2026-68097

In the Linux kernel ksmbd code path, the ACE size check in set_ntacl_dacl() does not verify that the declared ACE size can contain all sub-authorities described by sid.num_subauth. An undersized ACE can be copied, allowing a subsequent POSIX ACL deduplication walk to read data beyond the copied A...

EUVD-2026-55478

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate ACE size against SID sub-authorities setntacldacl validates sid.numsubauth before copying an ACE, but does not verify that the declared ACE size contains all sub-authorities described by that field. An undersized...

Astra Linux – Vulnerability in Linux 6.1

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

CVE-2026-64380

A flaw was found in the Linux kernel's Server Message Block SMB client. The vulnerability exists in the posixinfosidsize function, which is responsible for parsing POSIX Security Identifiers SIDs. An insufficient boundary check allows the system to accept truncated POSIX SIDs, which could lead to...

SUSE CVE-2026-64379

In the Linux kernel, the following vulnerability has been resolved: smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parsedacl applies the server-provided subauth2 value from the NFS mode SID to cfmode without masking to 07777. Apply the correct masking,...

CVE-2026-64380

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posixinfosidsize reads sid1 to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid1 ...

UBUNTU-CVE-2026-64380

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posixinfosidsize reads sid1 to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid1 ...

CVE-2026-64380 smb: client: harden POSIX SID length parsing

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posixinfosidsize reads sid1 to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid1 ...

CVE-2026-64380

The CVE-2026-64380 issue affects the Linux kernel SMB client path handling of POSIX SIDs. The root cause is in posix_info_sid_size(), which reads sid[1] to obtain the subauthority count but previously allowed buffers with only one remaining byte, potentially enabling unsafe rejection of truncated...

CVE-2026-64379

In the Linux kernel, the following vulnerability has been resolved: smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parsedacl applies the server-provided subauth2 value from the NFS mode SID to cfmode without masking to 07777. Apply the correct masking,...

PT-2026-64600

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the SMB client where the parse dacl function fails to mask the server-provided sub auth2 value from the NFS mode SID to 07777 when modefromsid is active. This value is...

PT-2026-64601

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the SMB client regarding the parsing of POSIX SID lengths. The function posix info sid size reads sid1 to determine the subauthority count, but the boundary check...

Linux Distros Unpatched Vulnerability : CVE-2026-64379

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parsedacl applies the server-provided subauth2 value from the NFS mod...

Linux Distros Unpatched Vulnerability : CVE-2026-64380

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - smb: client: harden POSIX SID length parsing posixinfosidsize reads sid1 to obtain the subauthority count, but its existing boundary check still accepts buffers...

cifs-utils security, bug fix, and enhancement update

An update is available for cifs-utils. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The SMB/CIFS protocol is a standard file sharing protocol widely deployed ...

RLSA-2026:39575 Important: cifs-utils security, bug fix, and enhancement update

The SMB/CIFS protocol is a standard file sharing protocol widely deployed on Microsoft Windows machines. The cifs-utils packages contain tools for mounting shares on Linux using the SMB/CIFS protocol. The tools in this package work in conjunction with support in the kernel to allow one to mount a...

SUSE CVE-2026-64139

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix SID memory leak in setposixaclentriesdacl on overflow Commit 299f962c0b02 "ksmbd: use checkaddoverflow to prevent u16 DACL size overflow" added checkaddoverflow guards that break out of the ACE-building loops in...

Linux Distros Unpatched Vulnerability : CVE-2026-64139

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix SID memory leak in setposixaclentriesdacl on overflow Commit 299f962c0b02 ksmbd: use checkaddoverflow to prevent u16 DACL size overflow added...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache CVE-2026-31402 In the Linux kernel, the following vulnerability has been resolved: ext4: validate pidx bounds in ext4extcorrectindexes CVE-2026-31449 In the Lin...

EUVD-2026-45824

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix SID memory leak in setposixaclentriesdacl on overflow Commit 299f962c0b02 "ksmbd: use checkaddoverflow to prevent u16 DACL size overflow" added checkaddoverflow guards that break out of the ACE-building loops in...