What’s Vulnerable › Vulnerabilities

CVE-2026-97505: PCI/sysfs: Add CAP_SYS_ADMIN check to __resource_resize_store()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-30

Description

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 products

• Linux: 6.1 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0be4e21287e1e4865b9de498e1acc65b873f52f5
• https://git.kernel.org/stable/c/25ec7f57deceec633f27bc93b615f951e2ade814
• https://git.kernel.org/stable/c/b722a607f858b9cd036075ea0efad553fb98e982
• https://git.kernel.org/stable/c/cbf0628c0b7db86c5ce36451f088101546acbf1d
• https://git.kernel.org/stable/c/d02dd7ce8e52b66b7d3b6eca2a7d81e7f5b10a62

Get alerted when CVE-2026-97505 or the next vulnerability affects your stack