SB20260918292 - Race condition in Linux kernel misc sgi-gru driver
Published: September 18, 2026
Security Bulletin ID
SB20260918292
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) Race condition (CVE-ID: CVE-2026-90383)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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 trigger an unsafe page-table walk.
The vulnerability exists due to improper synchronization in the GRU TLB miss handler when handling a GRU TLB miss in interrupt context. A local user can trigger a GRU TLB miss to trigger an unsafe page-table walk.
Remediation
Install update from vendor's website.