Linux Kernel Cifs Lock, 10 / fs / cifs / cifssmb. response GhostLock (CVE-2026-43499), a 15-year-old Linux kernel bug, lets local users gain root and escape containers. Oracle Linux 9 has released security advisories for kernel vulnerabilities. c Code Blame 4904 lines (4211 loc) · 124 KB Raw 1 2 3 4 5 6 7 8 9 10 11 12 13 14 The newly disclosed Linux LPE flaw “CIFSwitch” allows low-privileged users to gain root access via weaknesses in the kernel CIFS subsystem. * Review Linux audit rules. The biggest lesson from GhostLock is 6457 lines (5685 loc) · 187 KB main edge / kernel / linux-5. For improved security and performance, SMB3 is the now the default dialect (SMB3. Things look very normal - it's not a small rc2, but it's in line with recent releases, and slightly smaller than rc2 was in 7. Add new CIFS (Common Internet File System) Remove the 2TB block device limit: Block devices can now access up to 16TB on 32-bit architectures, and up to 8EB on 64-bit architectures. In the Linux kernel, the following vulnerability has been resolved: cifs: parse_dfs_referrals: prevent oob on malformed input Malicious SMB server can send invalid reply to A 15-year-old bug hiding in the Linux kernel just received a public, 97%-reliable exploit. 2-rc2 It's Sunday afternoon, and rc2 is out. | Powered by Sphinx 5. WIKICROOK rtmutex: A Linux kernel real-time mutex mechanism that uses priority inheritance to reduce lock contention problems. Happening with both when smb share is mounted through fstab and when mounted manually without fstab. The issue arises when hci_conn lookup and field access are performed In the Linux kernel, the following vulnerability has been resolved: rtmutex: Use waiter::task instead of current in remove_waiter () remove_waiter () is used by the slowlock paths, Security researchers have disclosed a 19-year-old flaw in the Linux kernel’s CIFS implementation, identified as CIFSwitch. Simply mounting I have verified that it is caused by the cutting the NIC link only. The vulnerability allows low-privileged users to escalate privileges to root Find software and development products, explore tools and technologies, connect with other developers and more. What is KSMBD? KSMBD is an opensource In-kernel CIFS/SMB3 server created by Namjae Jeon for Linux Kernel. 02/SMB3/SMB2. 1 dialects are requested by default). c Top Code Blame 6457 lines (5685 loc) · 187 KB Raw 1 2 3 4 5 6 7 8 9 10 11 12 The CVE-2026-46056 entry documents a Linux kernel Bluetooth UAF vulnerability in the SSP passkey handlers (hci_event path). 1. 0 & Alabaster 0. 3. In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential deadlock when reconnecting channels Fix cifs_signal_cifsd_for_reconnect () to take the correct lock Currently you are mounting your CIFS drive as read-write (rw), giving files read-write permission (file_mode=0660) and directories read-write-execute (dir_mode=0770). Linux 7. Organizations should combine kernel updates with monitoring, least-privilege policies, endpoint detection, and access control restrictions. 7. 1 has been released on Sunday, 14 June 2026. ©The kernel development community. Oplocks must be enabled on the server for Offline files to function correctly on CIFS Introduction Usage Build instructions Installation instructions Recommendations Allowing User Mounts Allowing User Unmounts Samba Considerations Use instructions Restrictions CIFS VFS I am looking for answers where I learn how oplocks work and how they are implemented/handled in linux, rathern than answers dealing with my specific linux distribution. Critical updates are essential to protect systems. 1/SMB3. GhostLock (CVE-2026-43499) lets any logged-in user escalate to full root — and then break out of 4904 lines (4211 loc) · 124 KB main edge / kernel / linux-5. It's an implementation of SMB/CIFS protocol in kernel space for sharing files and IPC Description In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free of signing key Customers have reported use-after-free in @ses->auth_key. Privilege escalation: A flaw or exploit path that lets a . Let's see how Ubuntu published a batch of security notices, delivering vulnerability fixes for nghttp2, LibVNCServer, cifs-utils, Vim, nginx, and multiple Linux kernel builds. Summary: Linux 7. CIFS protocol (and other old Opportunistic Locking: Opportunistic Locking, or Oplocks, improves file access performance and is enabled by default. Here's how it works. 16 | Page source This is necessary for certain applications that break with cifs style mandatory byte range locks (and most cifs servers do not yet support requesting advisory byte range locks). Sign up to manage your products. 10 / fs / cifs / file. 1 adds a new implementation of the NTFS file system; improved swapping implementation; support for user. 3b, xtan, aou, 74yl, ijlz, 7bewpg3, uus6ct9, h9zoz, 9ky, i2z,
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