SB2025120459 - Out-of-bounds read in Linux kernel hyp nvhe
Published: December 4, 2025
Security Bulletin ID
SB2025120459
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2025-40266)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the __do_ffa_mem_xfer() function in arch/arm64/kvm/hyp/nvhe/ffa.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.