SUSE CVE-2026-64140

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in procshowfiles When a SMB2 client opens a file with a durable v2 handle and then issues SMB2 SESSIONLOGOFF, sessionfdcheck clears fp-tcon = NULL on the reconnectable file pointer but leaves t...

SUSE CVE-2026-64141

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in compareguidkey sessionfdcheck walks the per-inode moplist during durable-handle session teardown and sets op-conn = NULL for every opinfo whose conn matched the closing session's connection...

SUSE CVE-2026-64142

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close durable scavenger races against mfplist lookups ksmbddurablescavenger has two related races against any walker that iterates fci-mfplist, including ksmbdlookupfdinode used by ksmbdvfsrename and the share-mode checks ...

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,...

ANT-2026-M8R2AWBV · linux · other

other high Severity Claude high · Security research firm - · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-M8R2AWBV: ksmbd SMB-Direct: pre-auth remote heap overflow via preferredsendsize signedness mintint Pre-auth remot...

ANT-2026-14WRNADB · linux · use-after-free

use-after-free high Severity Claude high · Security research firm - · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-14WRNADB: ksmbd: use-after-free of shareconf via multichannel LOGOFF race SMB3 multichannel: SESSIONLOGO...

CVE-2026-64142

A flaw was found in the Linux kernel's ksmbd component. Two race conditions in the ksmbddurablescavenger function can lead to list corruption and a Use-After-Free UAF vulnerability. A remote attacker could potentially exploit these race conditions during durable handle scavenging and lookup...

CVE-2026-53390

A flaw was found in the Linux kernel's ksmbd component. An authenticated client can exploit an out-of-bounds read vulnerability in the smbcheckpermdacl function by providing a specially crafted Access Control Entry ACE. This crafted ACE, when processed during an access check on a share that uses...

CVE-2026-53383

A flaw was found in the Linux kernel's ksmbd component. A remote attacker can trigger a NULL pointer dereference by sending a specially crafted compound SMB2 request. This occurs because the session validation logic for non-first operations in a compound request does not properly check the sessio...

CVE-2026-64139

A flaw was found in the ksmbd kernel SMB daemon component of the Linux kernel. A malicious or specially crafted file with a large number of POSIX Access Control List ACL entries can trigger a memory leak in the setposixaclentriesdacl function. This occurs when the accumulated DACL size overflows,...

CVE-2026-64141

A flaw was found in the ksmbd component of the Linux kernel. A remote attacker can trigger a null pointer dereference by negotiating a new session with a specific client identifier ClientGuid and issuing a Server Message Block SMB2 CREATE request with a lease context on a different inode after a...

Linux Distros Unpatched Vulnerability : CVE-2026-64141

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in compareguidkey sessionfdcheck walks the per-inode...

Linux Distros Unpatched Vulnerability : CVE-2026-53383

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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: ...

Linux Distros Unpatched Vulnerability : CVE-2026-63909

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: OOB read regression in smbcheckpermdacl ACE-walk loops Commit d07b26f39246 ksmbd: require minimum ACE size in smbcheckpermdacl introduced a transposed...

Linux Distros Unpatched Vulnerability : CVE-2026-64138

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: validate SID in parent security descriptor during ACL inheritance Introduce smbvalidatentsdsid helper to safely validate Owner SID and Group SID inside t...

Linux Distros Unpatched Vulnerability : CVE-2026-64140

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in procshowfiles When a SMB2 client opens a file with a...

Linux Distros Unpatched Vulnerability : CVE-2026-64016

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix durable reconnect error path file lifetime After a durable reconnect succeeds,...

Linux Distros Unpatched Vulnerability : CVE-2026-53390

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

SUSE 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-2026-64141

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in compareguidkey sessionfdcheck walks the per-inode moplist during durable-handle session teardown and sets op-conn = NULL for every opinfo whose conn matched the closing session's connection...