ksmbd: fix FSCTL permission bypass by adding a permission check for FSCTL_SET_SPARSE

...

CVE-2026-53046

The CVE-2026-53046 entry concerns the ksmbd component of the Linux kernel. The vulnerability arises in ksmbd_crypt_message(), which sets a NULL completion callback on AEAD requests and does not properly handle -EINPROGRESS from async hardware crypto engines such as the Qualcomm Crypto Engine (QCE...

CVE-2026-45924

In the Linux kernel, the following vulnerability has been resolved: ksmbd: call ksmbdvfskernpathendremoving on some error paths There are two places where ksmbdvfskernpathendremoving needs to be called in order to balance what the corresponding successful call to ksmbdvfskernpathstartremoving has...

PT-2026-43791

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ksmbd module where the function ksmbd vfs kern path end removing is not called on certain error paths. This failure to balance the corresponding ksmbd vfs kern pat...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: server: Fixed a leak in activenumconn when there is a failure in transport allocation. The commit 77ffbcac4e56 “smb: server: fixed the leak in activenumconn in ksmbdtcpnewconnection” addresses the failure path in kthreadrun...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Out-of-bounds access has been avoided in the decodepreauthctxt function. It has been confirmed that the address of pnegctxt-HashAlgorithms lies within the boundaries of the SMB request. The deassemblenegcontexts function...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Compare MACs in constant time To prevent timing attacks, MAC comparisons need to be performed in constant time. Replace the memcmp function with the correct function, cryptomemneq...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in the Linux kernel before version 6.3.8. The file fs/smb/server/smb2pdu.c in ksmbd contains an integer underflow and an out-of-bounds read during the deassemblenegcontexts function...

SUSE CVE-2026-31705

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds write in smb2getea EA alignment smb2getea applies 4-byte alignment padding via memset after writing each EA entry. The bounds check on buffreelen is performed before the value memcpy, but the alignment...

Linux Distros Unpatched Vulnerability : CVE-2026-31705

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 write in smb2getea EA alignment smb2getea applies 4-byte alignment padding via memset after writing each EA entry. The bounds check on...

CVE-2026-31717

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate owner of durable handle on reconnect Currently, ksmbd does not verify if the user attempting to reconnect to a durable handle is the same user who originally opened the file. This allows any authenticated user to...

CVE-2026-31704

CVE-2026-31704 affects the Linux kernel’s ksmbd ACL handling. The vulnerability arises when accumulating ACL entry sizes uses 16-bit counters (u16) in set_posix_acl_entries_dacl() and set_ntacl_dacl(), allowing wraparound past 65535 and causing pointer arithmetic on pndace to land within already-...

ksmbd: require 3 sub-authorities before reading sub_auth[2]

...

CVE-2026-31610 ksmbd: fix mechToken leak when SPNEGO decode fails after token alloc

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix mechToken leak when SPNEGO decode fails after token alloc The kernel ASN.1 BER decoder calls action callbacks incrementally as it walks the input. When ksmbddecodenegTokenInit reaches the mechToken 2 OCTET STRING...

Linux kernel 安全漏洞

The Linux kernel is the kernel used by the Linux operating system developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from ksmbd’s handling of composite requests like QUERYDIRECTORY + QUERYINFOFILEALLINFORMATION. This...

CVE-2026-23427 ksmbd: fix use-after-free in durable v2 replay of active file handles

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in durable v2 replay of active file handles parsedurablehandlecontext unconditionally assigns dhinfo-fp-conn to the current connection when handling a DURABLEREQV2 context with SMB2FLAGSREPLAYOPERATION...

SUSE CVE-2026-23093

In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbd: fix dmaunmapsg nents The dmaunmapsg functions should be called with the same nents as the dmamapsg, not the value the map function returned...

ksmbd: skip lock-range check on equal size to avoid size==0 underflow

...

CVE-2025-68809

In the Linux kernel, the following vulnerability has been resolved: ksmbd: vfs: fix race on mflags in vfscache ksmbd maintains delete-on-close and pending-delete state in ksmbdinode-mflags. In vfscache.c this field is accessed under inconsistent locking: some paths read and modify mflags under...

UBUNTU-CVE-2025-68817

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbdtreeconnectput under concurrency Under high concurrency, A tree-connection object tcon is freed on a disconnect path while another path still holds a reference and later executes put/write on it...