CVE-2026-46009
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 versions
Linux kernel versions
5.12
and later are affected. Fixed in
5.15.209,
6.1.175,
6.6.140,
6.12.86,
6.18.27,
7.0.4,
7.1-rc1
and their respective stable series.
References
The following references provide additional information about CVE-2026-46009 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/3446beddba450c8d6f9aca2f028712ac527fead3
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PatchKernel patch commithttps://git.kernel.org/stable/c/65fc57c8b8f0b31be62be291cb1bb01755cec85d
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PatchKernel patch commithttps://git.kernel.org/stable/c/72099f015d3c77bf2eb703d1aab113bd7a60915a
Frequently asked questions
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What is CVE-2026-46009?
CVE-2026-46009 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.12 onward and has been patched in 5.15.209, 6.1.175, 6.6.140 and others. CVE-2026-46009 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46009?
Yes — CVE-2026-46009 has been patched. Fixed versions include 5.15.209, 6.1.175, 6.6.140 and others. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46009 actively exploited?
No — CVE-2026-46009 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.