SUSE CVE-2026-64389

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate NTLMv2 response before updating session key ksmbdauthntlmv2 derives the NTLMv2 session key into sess-sesskey before it verifies the NTLMv2 response. ksmbddecodentlmsspauthblob then continues into KEYXCH even when...

UBUNTU-CVE-2026-64396

In the Linux kernel, the following vulnerability has been resolved: 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 registers the asynchronous work into the connection's asyncrequests...

PT-2026-64612

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ksmbd module where Alternate Data Streams ADS, which are stored as extended attributes xattrs, do not use the credentials captured when the SMB handle was opened...

Linux Distros Unpatched Vulnerability : CVE-2026-53198

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

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The UAF issue in ksmbdtcpnewconnection has been fixed. The race that occurs is between the process of handling a new TCP connection and its disconnection. This causes a UAF error in the struct tcptransport structure within...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: A possible reference count leak in smb2open has been fixed. The reference count of ACLs will cause a leak when memory allocation fails. This issue has been addressed by adding the missing posixaclrelease function...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The reference count leak in smbcheckpermdacl has been fixed. The issue occurs in a specific part of smbcheckpermdacl. When “id” and “uid” have the same value, the function simply jumps out of the loop without decrementing...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ksmbd: It is required that 3 sub-authorities are present before reading subauth2. parsedacl compares each ACE SID against sidunixNFSmode. When a match is found, it reads sid.subauth2 as the file mode. If sidunixNFSmode represents...

CVE-2026-43379

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smblazyparentleasebreakclose opinfo pointer obtained via rcudereferencefp-fopinfo is being accessed after rcureadunlock has been called. This creates a race condition where the memory could be freed b...

CVE-2026-31718

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbdclosefd via durable scavenger When a durable file handle survives session disconnect TCP close without SMB2LOGOFF, sessionfdcheck sets fp-conn = NULL to preserve the handle for later reconnection...

ksmbd: do not expire session on binding failure

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ksmbd: Compare MACs in constant time

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ROS-20260121-73-0032

A vulnerability in the ksmbd component of the Linux operating system kernel is related to reading outside the allowed data buffer boundaries. Exploitation of the vulnerability may allow an attacker to gain access to sensitive data and also cause a denial of service...

ksmbd: vfs: fix race on m_flags in vfs_cache

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PT-2025-51659

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the Linux kernel's ksmbd module where a socket is leaked when the per-IP connection limit is exceeded during connection attempts. Specifically, when ksmbd kthread fn...

ksmbd: prevent connection release during oplock break notification

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Exploit for CVE-2025-38501

Overview Proof-of-Concept exploit for KSMBDrain CVE-2025-3850...

Linux Distros Unpatched Vulnerability : CVE-2025-37952

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 in closefiletableids A use-after-free is possible if one thread destroys the file via ksmbdclosefd while another thread holds a reference to it...

Linux Distros Unpatched Vulnerability : CVE-2022-47938

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. fs/ksmbd/smb2misc.c has an out-of-bounds read and OOPS for SMB2TREECONNECT...

CVE-2025-38561

CVE-2025-38561 concerns the ksmbd component of the Linux kernel. A race condition on Preauh_HashValue may occur when a client sends multiple session setup requests to ksmbd, due to how sess->Preauh_HashValue was previously freed during session setup. The fix moves freeing of sess->Preauh_Ha...