CVE-2026-90174
kernel: ksmbd: fix slab-out-of-bounds read in ksmbd_alloc_user()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 31, 2026
Description
A flaw was found in ksmbd in the Linux kernel. A remote attacker can send a specially crafted login response with an oversized hash size during the authentication process. This can lead to a slab-out-of-bounds read in the ksmbd_alloc_user() function, potentially resulting in information disclosure or a denial of service.
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-125 · Out-of-bounds Read