SB2026072798 - Out-of-bounds read in Linux kernel pci driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64460)

CWE-ID: CWE-125 - Out-of-bounds read

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 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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/55fd485e66d0ad5c762c23dba1461fe9c741cd96
• https://git.kernel.org/stable/c/b77524621250407386f44c6eea7e5e4619ada1ce
• https://git.kernel.org/stable/c/f34f1712229d71ce4286440fef12526fd4590b37