CVE-2026-68381

In the Linux kernel, the following vulnerability has been resolved: ksmbd: pin conn during async oplock break notification smb2oplockbreaknoti and smb2leasebreaknoti store a ksmbdconn pointer in an async ksmbdwork and then queue that work on ksmbd-io. The work only increments conn-rcount, which...

CVE-2026-68381

CVE-2026-68381 affects the Linux kernel ksmbd (SMB server) and describes a race between connection teardown and asynchronous oplock/lease break notifications. The vulnerability occurs when a ksmbd_conn pointer is stored in an async work item and queued on ksmbd-io; the work only increments conn-&...

UBUNTU-CVE-2025-21955

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent connection release during oplock break notification ksmbdwork could be freed when after connection release. Increment rcount of ksmbdconn to indicate that requests are not finished yet and to not release the...

Linux Kernel Security Vulnerabilities

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 the Linux kernel that stems from ksmbd potentially releasing connections during oplock interrupt notification...

samba: infinite loop flaw in smbd on unexpected oplock break notification reply

smbd in Samba 3.0 before 3.0.37, 3.2 before 3.2.15, 3.3 before 3.3.8, and 3.4 before 3.4.2 allows remote authenticated users to cause a denial of service infinite loop via an unanticipated oplock break notification reply packet...