Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-93811
Published: September 25, 2026
Vulnerability identifier: #VU152079
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93811
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a memory leak and an incorrect success result.
The vulnerability exists due to improper exceptional-condition handling in ksmbd_vfs_get_sd_xattr() when validating a decoded security descriptor size. A local user can trigger validation of a security descriptor smaller than struct smb_ntsd to cause a memory leak and an incorrect success result.
Affected software
Linux kernel
How to mitigate CVE-2026-93811
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3