CVE-2026-93785
kernel: cifs: validate idmap key payload length
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 24, 2026
Updated · September 28, 2026
Description
A flaw was found in the Linux kernel's Common Internet File System (CIFS) implementation. An integer truncation issue in the identity mapping key handler allows a local user to supply an oversized key payload that exceeds the maximum supported length limit. This size discrepancy causes subsequent operations to process the payload with inconsistent boundary lengths, which can lead to memory corruption or a denial of service (DoS).
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-681 · Incorrect Conversion between Numeric Types