CVE-2026-46009
PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown
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.
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
June 1, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Remove duplicate resource teardown.
- Remove unused pci_epc_put() function.
- Simplify EPC device refcounting logic.
References to Advisories, Solutions, and Tools
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information, practical solutions, and valuable tools related to
CVE-2026-46009.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46009 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46009
weaknesses.
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The following table lists the changes that have been made to the
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Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/c3029721b84f59e790285ad27544ed5d3cb0f2a6 Added Reference https://git.kernel.org/stable/c/c72f6a7ea638f95c486a5cfd86e567b646027687 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/3446beddba450c8d6f9aca2f028712ac527fead3 Added Reference https://git.kernel.org/stable/c/65fc57c8b8f0b31be62be291cb1bb01755cec85d Added Reference https://git.kernel.org/stable/c/72099f015d3c77bf2eb703d1aab113bd7a60915a Added Reference https://git.kernel.org/stable/c/756ca5e7ed22d9045bb4de4c981f9149278d5cd3 Added Reference https://git.kernel.org/stable/c/e813c95e4c8edd31599081e6356e20ada30e266d