What happened
In the Linux kernel, the following vulnerability has been resolved: PCI/sysfs: Add CAP_SYS_ADMIN check to __resource_resize_store() Currently, the __resource_resize_store() allows writing to the resourceN_resize sysfs attribute to change a BAR's size without checking for capabilities, currently relying only on the file access check. Resizing a BAR modifies PCI device configuration and can disrupt active drivers. After the upcoming conversion to static attributes, it will also trigger resource file updates via sysfs_update_groups(). Add a CAP_SYS_ADMIN check to prevent unprivileged users from performing BAR resize operations.
Affected versions
Linux: 91fa127794ac1c48069479b9d45eb4c7378c0e30 through before b722a607f858b9cd036075ea0efad553fb98e982 (git); 91fa127794ac1c48069479b9d45eb4c7378c0e30 through before cbf0628c0b7db86c5ce36451f088101546acbf1d (git); 91fa127794ac1c48069479b9d45eb4c7378c0e30 through before 25ec7f57deceec633f27bc93b615f951e2ade814 (git); 6.1 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.