Out-of-bounds read in Linux kernel - CVE-2026-64460
Published: July 27, 2026
Vulnerability identifier: #VU139474
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-64460
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in sriov_restore_vf_rebar_state() when restoring VF Resizable BAR state after configuration reads return an error response. A local user can trigger access to an unresponsive device state to cause a denial of service.
The issue is triggered because error responses cause 3-bit fields in the VF Resizable BAR Control register to evaluate to index values beyond the six-entry barsz[] array.
Affected software
Linux kernel
How to mitigate CVE-2026-64460
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3