What’s Vulnerable › Vulnerabilities

CVE-2026-46009: PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown epf_ntb_epc_destroy() duplicates the teardown that the caller is supposed to do later. This leads to an oops when .allow_link fails or when .drop_link is performed. Remove the helper. Also drop pci_epc_put(). EPC device refcounting is tied to configfs EPC group lifetime, and pci_epc_put() in the .drop_link path is sufficient.

Affected products

• Linux kernel: from 5.12 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 — fixed in 5.15.209, 6.1.175, 6.12.86, 6.18.27, 6.6.140, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 5.15.209, 6.1.175, 6.12.86, 6.18.27. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3446beddba450c8d6f9aca2f028712ac527fead3
• https://git.kernel.org/stable/c/65fc57c8b8f0b31be62be291cb1bb01755cec85d
• https://git.kernel.org/stable/c/72099f015d3c77bf2eb703d1aab113bd7a60915a
• https://git.kernel.org/stable/c/756ca5e7ed22d9045bb4de4c981f9149278d5cd3
• https://git.kernel.org/stable/c/c3029721b84f59e790285ad27544ed5d3cb0f2a6
• https://git.kernel.org/stable/c/c72f6a7ea638f95c486a5cfd86e567b646027687
• https://git.kernel.org/stable/c/e813c95e4c8edd31599081e6356e20ada30e266d

Get alerted when CVE-2026-46009 or the next vulnerability affects your stack