EUVD-2026-81746

In the Linux kernel, the following vulnerability has been resolved: ksmbd: bound smbcheckpermdacl ACE walks by DACL size smbcheckpermdacl validates that the DACL fits inside the NT security descriptor, but then bounds its two ACE walks by the remaining NTSD length aclsize rather than the DACL's...

CVE-2026-90153 ksmbd: bound smb_check_perm_dacl() ACE walks by DACL size

In the Linux kernel, the following vulnerability has been resolved: ksmbd: bound smbcheckpermdacl ACE walks by DACL size smbcheckpermdacl validates that the DACL fits inside the NT security descriptor, but then bounds its two ACE walks by the remaining NTSD length aclsize rather than the DACL's...

CVE-2026-90153

CVE-2026-90153 affects the Linux kernel ksmbd subsystem (in-kernel SMB server). The vulnerable function smb_check_perm_dacl() bounds its ACE walks by the remaining NT security descriptor length (acl_size) instead of the DACL's declared size (pdacl_size). An attacker with low privileges can craft ...

CVE-2026-90153 ksmbd: bound smb_check_perm_dacl() ACE walks by DACL size

In the Linux kernel, the following vulnerability has been resolved: ksmbd: bound smbcheckpermdacl ACE walks by DACL size smbcheckpermdacl validates that the DACL fits inside the NT security descriptor, but then bounds its two ACE walks by the remaining NTSD length aclsize rather than the DACL's...

CVE-2025-38561

CVE-2025-38561 ksmbd: PreauhHashValue の競合状態。クライアントが ksmbd に複数のセッションセットアップ要求を送信すると、PreauhHashValue の競合状態が発生する可能性があります。...

KSMBD-CVE-2025-37947

CVE-2025-37947 の ksmbd 向け PoC 詳細については、こちらの記事を参照してください。 ファイル bpf-tracer.sh - BPF msgmsg トレーサー CVE-2025-37947.c - CVE-2025-37947 のエクスプロイト proof-of-concept.c - OOB 書き込みを引き起こす最小トリガー ksmbd.conf - ksmbd 設定 Makefile - エクスプロイトをビルド run-qemu.sh - Ubuntu QEMU VM を起動します。ubuntu-22.04.5.qcow2 が存在している必要があります...

UBUNTU-CVE-2026-89788

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

UBUNTU-CVE-2026-89792

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the pat...

CVE-2026-89788

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89792

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the pat...

ksmbrace

ksmbrace ksmbd （Linuxカーネルのカーネル内SMB3サーバー、fs/smb/server/）における脆弱性研究です。ksmbdのdurableハンドルとパス解決の経路における、認証済み攻撃者が悪用できる欠陥を扱います。この名前は、この一連の研究のテーマである競合状態（race condition）に因んでいます（未公開のバイト範囲ロックUAF、CVE-2026-64396、d20d1c8ba576で修正済みを参照）。...

AZL-101355 CVE-2026-89794 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: zero pipe read compound padding Compound response handling extends the last response iov to an eight-byte boundary. smb2readpipe allocates only the payload size, so the alignment padding can expose up to seven bytes of...

CVE-2026-89794

CVE-2026-89794 affects the ksmbd (SMB server) component in the Linux kernel . The root cause lies in smb2_read_pipe(): compound response handling extends the last response iov to an eight-byte boundary, but the function allocates only the payload size. This mismatch means the alignment padding ca...

CVE-2026-89794 ksmbd: zero pipe read compound padding

In the Linux kernel, the following vulnerability has been resolved: ksmbd: zero pipe read compound padding Compound response handling extends the last response iov to an eight-byte boundary. smb2readpipe allocates only the payload size, so the alignment padding can expose up to seven bytes of...

EUVD-2026-80394

In the Linux kernel, the following vulnerability has been resolved: ksmbd: zero pipe read compound padding Compound response handling extends the last response iov to an eight-byte boundary. smb2readpipe allocates only the payload size, so the alignment padding can expose up to seven bytes of...

AZL-101150 CVE-2026-89792 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the pat...

CVE-2026-89792

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the pat...

DEBIAN-CVE-2026-89788

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89788

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

AZL-101159 CVE-2026-89788 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...