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]

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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

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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...

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 Linux kernel that stems from not properly destroying smbd connections when MR allocation fails in cifs, which could lead to the disclosure of...

The vulnerability of the ksmbd_conn_free() function in the fs/smb/server/connection.c module of the SMB subsystem of the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the ksmbdconnfree function in the fs/smb/server/connection.c module of the SMB subsystem of the Linux operating system is related to the reutilization of previously freed memory. Exploiting this vulnerability can allow an attacker to cause a service failure...

SUSE CVE-2025-68246

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close accepted socket when per-IP limit rejects connection When the per-IP connection limit is exceeded in ksmbdkthreadfn, the code sets ret = -EAGAIN and continues the accept loop without closing the just-accepted socket...

UBUNTU-CVE-2025-68246

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close accepted socket when per-IP limit rejects connection When the per-IP connection limit is exceeded in ksmbdkthreadfn, the code sets ret = -EAGAIN and continues the accept loop without closing the just-accepted socket...

ksmbd: Fix race condition in RPC handle list access

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CVE-2025-39942 ksmbd: smbdirect: verify remaining_data_length respects max_fragmented_recv_size

In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbdirect: verify remainingdatalength respects maxfragmentedrecvsize This is inspired by the check for dataoffset + datalength...

CVE-2023-53399

The connected documents confirm a Linux kernel vulnerability in ksmbd where a NULL pointer dereference could occur in smb2_get_info_filesystem() if share->path is NULL. A fix has been applied across affected kernels (Linux kernel 5.x line references appear in Astra Linux advisories and Debian/...

SUSE CVE-2025-38562

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference error in generateencryptionkey If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generateencryptionkey could happen. sess-PreauthHashValue is...

CVE-2025-38562 ksmbd: fix null pointer dereference error in generate_encryptionkey

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference error in generateencryptionkey If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generateencryptionkey could happen. sess-PreauthHashValue is...

DEBIAN-CVE-2023-3866

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request. If first operation in the compound is SMB2 ECHO request, ksmbd bypass session and tree validation. So...

DEBIAN-CVE-2025-38437

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix potential use-after-free in oplock/lease break ack If ksmbdiovpinrsp return error, use-after-free can happen by accessing opinfo-state and opinfoput and ksmbdfdput could called twice...