SB20260912124 - Integer overflow in Linux kernel nfsd
Published: September 12, 2026
Security Bulletin ID
SB20260912124
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-89665)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause improper filesystem timestamp handling.
The vulnerability exists due to an integer overflow in the NFSv2 sattr decoder in svcxdr_decode_sattr() when decoding NFSv2 SETATTR or CREATE time attributes. A remote attacker can send a crafted NFSv2 request containing an out-of-range useconds value to cause improper filesystem timestamp handling.
The overflow affects 32-bit ILP32 platforms.
Remediation
Install update from vendor's website.