PT-2026-6163

Name of the Vulnerable Software and Affected Versions Linux Kernel affected versions not specified Description A flaw exists in the Linux kernel's ksmd and smbd components related to the dma unmap sg function. The issue arises because dma unmap sg is called with an incorrect number of segments,...

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...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990603)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990603 advisory. In the Linux kernel, the following vulnerability has been resolved: cifs: Fix oops due to uncleared server-smbdconn in reconnect In smbddestroy, clear the...

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...

CVE-2023-4515

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate command request size In commit 2b9b8f3b68ed "ksmbd: validate command payload size", except for SMB2OPLOCKBREAKHE command, the request size of other commands is not checked, it's not expected. Fix it by add check f...

CVE-2023-4130 ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix wrong next length validation of ea buffer in smb2setea There are multiple smb2eainfo buffers in FILEFULLEAINFORMATION request from client. ksmbd find next smb2eainfo using -NextEntryOffset of current smb2eainfo. ksmbd...

CVE-2025-38501

In the Linux kernel, the following vulnerability has been resolved: ksmbd: limit repeated connections from clients with the same IP Repeated connections from clients with the same IP address may exhaust the max connections and prevent other normal client connections. This patch limit repeated...

Linux Distros Unpatched Vulnerability : CVE-2025-21944

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix bug on trap in smb2lock If lock count is greater than 1, flags could be old value. It should be checked with flags of smblock, not flags. It will cau...

Linux Distros Unpatched Vulnerability : CVE-2025-21946

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 in parsesecdesc If osidoffset, gsidoffset and dacloffset could be greater than smbntsd struct size. If it is smaller, It could cause...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fixed a use-after-free issue in Kerberos authentication. The introduction of sess-user = NULL was necessary to fix the dangling pointer created by ksmbdfreeuser. However, it is possible that another thread might be...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fix for a use-after-free in smb2lock. If smblock-zerolen has a value, the -llist of smblock is not deleted, and flock is an old version. This could lead to a use-after-free during error handling routines...

UBUNTU-CVE-2025-22074

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix rcount dec/increment mismatch rcount is only increased when there is an oplock break wait, so rcount inc/decrement are not paired. This can cause rcount to become negative, which can lead to a problem where the ksmbd...

DEBIAN-CVE-2025-22039

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix overflow in dacloffset bounds check The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smbcheckpermdacl and...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the reuse of ksmbd multi-channel connection sessions after release...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: The issue related to “slab-use-after-free” in smb3preauthhashrsp has been fixed. The function ksmbdusersessionput should be called under smb3preauthhashrsp. This will prevent freeing a session before calling...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: A potential out-of-bounds error has been fixed when the buffer offset is invalid. I identified a potential out-of-bounds situation when the buffer offset fields of several requests are invalid. This patch sets the minimum...