CVE-2026-45880
In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap() doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when trying to remove the PCI device. Fix it by adding the missed percpu_ref_put().
Affected versions
Linux kernel versions
6.2
and later are affected. Fixed in
6.6.128,
6.12.75,
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45880 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/51b7181cfbedf289ce794b6d97a1c596c309ec38
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PatchKernel patch commithttps://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3
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PatchKernel patch commithttps://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f
Frequently asked questions
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What is CVE-2026-45880?
CVE-2026-45880 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.2 onward and has been patched in 6.6.128, 6.12.75, 6.18.14 and others. CVE-2026-45880 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-2026-45880?
Yes — CVE-2026-45880 has been patched. Fixed versions include 6.6.128, 6.12.75, 6.18.14 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45880 actively exploited?
No — CVE-2026-45880 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.