CVE-2026-98901

critical

Description

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.

References

https://git.kernel.org/stable/c/fba4653a0b4dc2f6d42600abe21fb326292f70ff

https://git.kernel.org/stable/c/5015191096db311759fef98769270336cd8b1324

https://git.kernel.org/stable/c/3251ea36df5eef58aa207fbee48849d89b922ea6

https://git.kernel.org/stable/c/17699905a381621c1cee5b6528feb05acedc86a4

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108857

Details

Source: Mitre, NVD

Published: 2026-10-23

Updated: 2026-10-23

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical