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...

SUSE CVE-2023-54250

In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decodepreauthctxt Confirm that the accessed pnegctxt-HashAlgorithms address sits within the SMB request boundary; deassemblenegcontexts only checks that the eight byte smb2negcontext header +...

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

CVE-2023-53399 affects the Linux kernel’s ksmbd component, specifically a NULL pointer dereference in smb2_get_info_filesystem(). The issue occurs when share is present but share->path is NULL, which can trigger a crash. The connected sources consistently describe the vulnerability as resolved...

smb3: fix for slab out of bounds on mount to ksmbd

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ksmbd: fix overflow in dacloffset bounds check

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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...

UBUNTU-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...

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...

UBUNTU-CVE-2025-37947

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds stream writes by validating pos ksmbdvfsstreamwrite did not validate whether the write offset pos was within the bounds of the existing stream data length vlen. If pos was greater than or equal to vle...

CVE-2025-37947 ksmbd: prevent out-of-bounds stream writes by validating *pos

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds stream writes by validating pos ksmbdvfsstreamwrite did not validate whether the write offset pos was within the bounds of the existing stream data length vlen. If pos was greater than or equal to vle...

kernel: smb: client: fix TCP timers deadlock after rmmod

REJECTED CVE A vulnerability was suspected in the Linux kernel's SMB client module related to TCP timers and potential deadlocks after module removal rmmod cifs. The issue stemmed from incorrect manual manipulation of sk-sknetrefcnt, which led to TCP timers not being properly cleared, causing...

ksmbd: fix type confusion via race condition when using ipc_msg_send_request

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UBUNTU-CVE-2025-37778

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krbauthenticate krbauthenticate frees sess-user and does not set the pointer to NULL. It calls ksmbdkrb5authenticate to reinitialise sess-user but that function may return without doing so. If that...