CVE-2026-98683
kernel: smb: client: flush dirty data before zeroing a range
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 22, 2026
Description
A flaw was found in the Linux kernel's SMB client. When zeroing a range within a file that does not reach the end of the file, dirty cached data is not flushed before the client requests the server to zero the region. A local user performing a zero-range operation could cause dirty cached pages to overwrite the zeroed range, resulting in data corruption and the retention of stale data.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 2.5CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE-821 · Incorrect Synchronization