SB2026092556 - Memory leak in Linux kernel smb server
Published: September 25, 2026
Security Bulletin ID
SB2026092556
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-93812)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper memory release in ksmbd_vfs_set_sd_xattr when encoding NT ACL data. A remote attacker can cause an encoding operation to return an error after memory allocation to cause a denial of service.
Remediation
Install update from vendor's website.