SB20260815166 - Out-of-bounds write in Linux kernel pci qat driver
Published: August 15, 2026
Security Bulletin ID
SB20260815166
CSH 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 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-74306)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds write in qat_vf_resume_write() when handling concurrent writes to the migration-state buffer. A local user can issue concurrent write operations to write past the end of the migration-state buffer and cause a denial of service.
Exploitation requires concurrent access to the affected file operation.
Remediation
Install update from vendor's website.