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-2026-45505

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2checkusersession takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work-sess the session bound by the first operation and...

CVE-2026-53383

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2checkusersession takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work-sess the session bound by the first operation and...

CVE-2026-53383

The CVE-2026-53383 issue affects the Linux kernel’s ksmbd component where a COMPOUND request could bypass validation of the session state. Specifically, smb2_check_user_session() reused work->sess for operations beyond the first in a COMPOUND, validating only SessionId and not rechecking work-...

CVE-2026-53383

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2checkusersession takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work-sess the session bound by the first operation and...

CVE-2026-53383 ksmbd: reject non-VALID session in compound request branch

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2checkusersession takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work-sess the session bound by the first operation and...

CVE-2026-53383 ksmbd: reject non-VALID session in compound request branch

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2checkusersession takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work-sess the session bound by the first operation and...

PT-2026-61458

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A null pointer dereference exists in the ksmbd module. During durable-handle session teardown, the session fd check function sets op-conn to NULL for matching opinfo entries, but these...

PT-2026-61088

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A remote NULL-pointer dereference exists in the ksmbd component of the Linux kernel. The smb2 check user session function fails to re-verify that a session state is SMB2 SESSION VALID fo...

PT-2026-61457

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A null pointer dereference exists in the proc show files function within the ksmbd module. This occurs when an SMB2 client opens a file using a durable v2 handle and then performs an SMB...

PT-2026-61226

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An out-of-bounds read exists in the smb check perm dacl function within the ksmbd module. This issue occurs during ACE-walk loops when a transposed bounds check fails to properly validat...

PT-2026-61456

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A memory leak exists in the ksmbd module within the set posix acl entries dacl function. The issue occurs when the system detects a DACL Discretionary Access Control List size overflow...

PT-2026-61333

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix durable reconnect error path file lifetime After a durable reconnect succeeds, ksmbd reopen durable fd republishes the same ksmbd file into the session volatile-id table. If smb2 open then takes a later error path,...

ROS-20260702-73-0009

The vulnerability of the ksmbdtreeconnlookup function in the fs/ksmbd/mgmt/treeconnect.c module of the SMB-server subsystem of the Linux operating system is related to the reutilization of previously freed memory. Exploiting this vulnerability could allow an attacker to compromise the...

SUSE CVE-2026-53046

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine ksmbdcryptmessage sets a NULL completion callback on AEAD requests and does not handle the -EINPROGRESS return code from async hardware crypto engines like the...

Linux Distros Unpatched Vulnerability : CVE-2026-53271

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix NULL-deref of opinfo-conn in oplock/lease break notifiers smb2oplockbreaknoti and smb2leasebreaknoti read opinfo-conn into a local with neither...

SUSE CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53198

A flaw was found in ksmbd, a Linux kernel module that provides an in-kernel SMB server. An authenticated SMB client can trigger a use-after-free vulnerability by sending a double SMB2CANCEL request for the same asynchronous operation. This can lead to memory corruption, potentially allowing an...

CVE-2026-53010

A flaw was found in the Linux kernel's ksmbd component. During a durable reconnect process in the smb2open function, a reference to a durable file descriptor is prematurely dropped. This can lead to a use-after-free vulnerability, potentially resulting in system instability or a denial of service...

CVE-2026-53271

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix NULL-deref of opinfo-conn in oplock/lease break notifiers smb2oplockbreaknoti and smb2leasebreaknoti read opinfo-conn into a local with neither READONCE nor a NULL check. Both run from oplockbreak after opinfogetlist h...