CVE-2026-98901

About vulnerability

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix lease break and ack state handling

Do not skip valid lease states containing WRITE_CACHING when breaking level-II/read leases for writes and truncates.

Handle lease break acknowledgments according to the SMB2 rule that the acknowledged state must be a subset of the server’s break target. Apply the acknowledged state directly and keep the break pending on failed ACKs.

Affected product:

AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 6 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 7 ELS , Debian 10 ELS , Debian 11 ELS , Oracle Linux 6 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 16.04 ELS , Ubuntu 18.04 ELS , Ubuntu 20.04 ELS

Affected packages:

linux @ 4.19.0 (+19 more)

Live-patch status from KernelCare for each operating system.