SB2026092577 - Numeric Truncation Error in Linux kernel smb client
Published: September 25, 2026
Security Bulletin ID
SB2026092577
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Numeric Truncation Error (CVE-ID: CVE-2026-93785)
CWE-ID: CWE-197 - Numeric Truncation Error
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause inconsistent payload length interpretation.
The vulnerability exists due to improper validation of payload length in the cifs.idmap key type when processing oversized preparsed payloads. A local user can provide an oversized preparsed payload to cause inconsistent payload length interpretation.
Remediation
Install update from vendor's website.