{"id":"CVE-2026-45880","title":"PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails\n\nWhen vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap()\ndoesn't invoke percpu_ref_put…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < baa42b756d183a59572f3890981a3d32b8d05d40","Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < 51b7181cfbedf289ce794b6d97a1c596c309ec38","Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < e19cce88ec4c4877f4ff2469099b9cf23cc3e93e","Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < a1f4dc72efc3204db95d052058d785cad7ce755f","Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < 6220694c52a5a04102b48109e4f24e958b559bd3","Linux 6.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:43:27.538093Z"},"published":"2026-05-27","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:53:10.517Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45880","references":[{"url":"https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40"},{"url":"https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38"},{"url":"https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e"},{"url":"https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f"},{"url":"https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3"}],"tags":["cve.org"],"epss":0.0016,"epssPercentile":0.05181,"ingestedAt":"2026-11-06T16:57:43.392Z","slug":"CVE-2026-45880","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nPCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails\n\nWhen vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap()\ndoesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired\nafter gen_pool_alloc_owner(), and memunmap_pages() will hang forever when\ntrying to remove the PCI device.\n\nFix it by adding the missed percpu_ref_put().\n\n## Affected\n\n- `Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < baa42b756d183a59572f3890981a3d32b8d05d40`\n- `Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < 51b7181cfbedf289ce794b6d97a1c596c309ec38`\n- `Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < e19cce88ec4c4877f4ff2469099b9cf23cc3e93e`\n- `Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < a1f4dc72efc3204db95d052058d785cad7ce755f`\n- `Linux >= 7e9c7ef83d785236f5a8c3761dd053fae9b92fb8 < 6220694c52a5a04102b48109e4f24e958b559bd3`\n- `Linux 6.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}