CVE-2026-45880
CVE-2026-45880 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-32346
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
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().
Frequently asked questions
- What is 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().
- How severe is CVE-2026-45880?
- CVE-2026-45880 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-45880 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-45880?
- CVE-2026-45880 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-45880?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-45880 have an EU (EUVD) identifier?
- Yes. CVE-2026-45880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32346.
- When was CVE-2026-45880 published?
- CVE-2026-45880 was published on 2026-05-27 and last updated on 2026-06-25.
References
- https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38
- https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3
- https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f
- https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40
- https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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