kernel: smb/client: fix out-of-bounds read in symlink_data()

A flaw was found in the Linux kernel's Server Message Block SMB client. This vulnerability arises from insufficient length validation in the smb2checkmessage function when processing symlink error responses. A remote attacker could exploit this by sending a specially crafted symlink error respons...

kernel: smb: client: fix query directory replay double-free

A flaw was found in the Linux kernel's Server Message Block SMB client. This vulnerability, a double-free error, occurs when the client attempts to free the same memory buffer twice during a directory query operation. An attacker could potentially exploit this flaw to cause memory corruption,...

CVE-2026-46243

🚨 CVE-2026-46243 - CIFSwitch Linux 内核本地权限提升 LPE 影响 Linux 内核 CIFS/SMB 客户端的本地权限提升漏洞。 📖 概述 CVE-2026-46243 是 Linux 内核 CIFS/SMB 客户端中的一个本地权限提升（LPE ）漏洞。 cifs.spnego 密钥描述验证不当，允许无特权的本地用户在特定系统配置下冒充受信任的内核生成请求，从而导致权限提升。 ✨ 亮点 📌 受影响的配置 成功利用通常需要： 启用了 CIFS 的 Linux 内核 cifs-utils 默认的 cifs.upcall 已启用用户命名空间 本地 shell...

windows-smb-vulnerability-framework-cve-2025-33073

Windows SMB 客户端漏洞研究框架 作者： cyberseallll 创建时间： 2025 概述 我开发了这个研究框架，用于分析和理解 CVE-2025-33073，这是一个严重的 Windows SMB 客户端权限提升漏洞。该实现为漏洞研究和受控测试环境提供了全面的工具。 漏洞详情 CVE-2025-33073 是一个可通过网络访问的权限提升漏洞，影响 Windows SMB 客户端实现。该漏洞源于 SMB 协议栈中不正确的访问控制机制。 技术规格 CVSS 评分 ：8.8（高危） 漏洞类型 ：CWE-284（访问控制不当） 攻击向量 ：网络 影响 ：权限提升 用户交互 ：无...

cifswitch-check

cifswitch-check LinuxシステムがCIFSwitch（CVE-2026-46243） — 2007年から存在するLinuxカーネルのCIFS/SMBクライアントにおけるローカル権限昇格の脆弱性 — にさらされているかどうかを確認するシェルスクリプト。 ベアメタルホスト、VM、コンテナ内部で動作。CI/CDパイプラインにそのまま投入できるよう設計されています。 背景 CIFSwitchは2026年5月28日にセキュリティ研究者Asim...

kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath

A flaw was found in the Linux kernel's CIFS Common Internet File System client. When the cifssanitizeprepath function processes specially crafted input, such as an empty string or a string containing only delimiters, it can attempt to read data beyond its allocated memory buffer. This out-of-boun...

Blackash-CVE-2025-33073

✨ CVE-2025-33073: Windows SMB RCE 脆弱性 🚨 🔥 高重大度の認証済みリモートコード実行 🔥 Windows SMB クライアントにおける不適切なアクセス制御 CWE-284 🛡️ 主な詳細概要...

CVE-2025-33073

CVE-2025-33073 — Windows SMB クライアント NTLM リフレクション権限昇格 EoP Sentinel AI Defense による調査レポート。防御的分析のみを目的としており、実働するエクスプロイト や PoC は公開されていません。 Windows SMB クライアントの不適切なアクセス制御の欠陥であり、緩和されたと考えられていた NTLM リフレクション技術を 復活させます。攻撃者がホストを強制して高権限の認証コンテキストを自身にリフレクションさせ、NT AUTHORITY\SYSTEM へ権限昇格できるようにします。 📄 完全なレポート:...

kernel: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()

A flaw was found in the Linux kernel's Server Message Block SMB client. A missing lock around the tccount increment in the smb2findsmbsesstconunlocked function creates a race condition. This vulnerability, caused by an incomplete refactoring of locking mechanisms, could lead to unexpected behavio...

kernel: smb: client: fix change notify replay double-free

A flaw was found in the Linux kernel's Server Message Block SMB client. This vulnerability occurs due to a double-free error when handling change notify replies. If a response attempt returns a replayable error and frees its buffer, and then SMB2notifyinit fails, the same buffer can be freed agai...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098973)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098973 advisory. In the Linux kernel, the following vulnerability has been resolved: smb: client: let recvdone verify dataoffset, datalength and remainingdatalength This is inspired ...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098694)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098694 advisory. In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2isvalidoplockbreak Skip sessions that are being teared down...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098924)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098924 advisory. In the Linux kernel, the following vulnerability has been resolved: smb: client: restrict implied bcc0 exemption to responses without data area smb2checkmessage has ...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098747)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098747 advisory. In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free in cifsoplockbreak A race condition can occur in cifsoplockbreak...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098683)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098683 advisory. In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifsfilldirent There is a race condition in the readdir...

The vulnerability of the smbd_post_send_iter() function in the fs/smb/client/smbdirect.c module of the Smb file system in the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the smbdpostsenditer function in the fs/smb/client/smbdirect.c module of the Smb file system in the Linux operating system is related to the repeated release of previously released memory. Exploiting this vulnerability could allow a remote attacker to compromise the...

The vulnerability of the matchSession() function in the fs/smb/client/connect.c module of the Smb file system in the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the matchSession function in the fs/smb/client/connect.c file of the SMB file system module in the Linux operating system is related to deficiencies in the authentication process. Exploiting this vulnerability could allow an attacker to compromise the confidentiality,...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb: Client: Fixed a potential Use-after-Free UAF in isvalidoplockbreak. Skipped sessions that are being torn down status == SESEXITING to avoid UAF...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb: client: Do not log plaintext credentials in cifssetcifscreds When debug logging is enabled, cifssetcifscreds logs the key payload and exposes the plaintext username and password. Remove the debug log to avoid exposing...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: smb: client: fixed UAF in async decryption Performing async decryption large read results in a crash due to a slabuseafterfree issue in the crypto API. Reproducing the issue: mount.cifs -o ...,seal,esize=1 //srv/share /mnt dd...