Linux Distros Unpatched Vulnerability : CVE-2026-64396

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd...

PT-2026-64613

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ksmbd module where delete-on-close operations can be completed during deferred or durable handle teardown without available request work. In these scenarios, the...

PT-2026-64620

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the Linux kernel, the smb2 ioctl function fails to perform necessary permission checks when processing the FSCTL DUPLICATE EXTENTS TO FILE control code. Specifically, it uses vfs clon...

Linux Distros Unpatched Vulnerability : CVE-2026-64390

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: track the connection owning a byte-range lock SMB2LOCK adds each granted byte-range lock to both the file lock list and the lock list of the connection...

Linux Distros Unpatched Vulnerability : CVE-2026-64389

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: validate NTLMv2 response before updating session key ksmbdauthntlmv2 derives the NTLMv2 session key into sess-sesskey before it verifies the NTLMv2...

Linux Distros Unpatched Vulnerability : CVE-2026-64392

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: use opener credentials for delete-on-close Delete-on-close can be completed by deferred or durable handle teardown, where no request work is available...

Linux Distros Unpatched Vulnerability : CVE-2026-64393

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: run set info with opener credentials SMB2 SETINFO handlers call path-based VFS helpers after checking the access mask granted to the SMB handle. Those...

Linux Distros Unpatched Vulnerability : CVE-2026-64437

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 use-after-free of a deferred filelock on SMB2CLOSE then SMB2CANCEL Commit...

SUSE CVE-2026-63909

In the Linux kernel, the following vulnerability has been resolved: ksmbd: OOB read regression in smbcheckpermdacl ACE-walk loops Commit d07b26f39246 "ksmbd: require minimum ACE size in smbcheckpermdacl" introduced a transposed bounds check: if offsetofstruct smbace, sid + acessize size offset 2...

SUSE 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...

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...

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...