{"id":"CVE-2026-45880","state":"PUBLISHED","title":"PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails","description":"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() 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().","publishedAt":"2026-05-27T12:16:52.117Z","updatedAt":"2026-05-27T12:16:52.117Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"baa42b756d183a59572f3890981a3d32b8d05d40","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"51b7181cfbedf289ce794b6d97a1c596c309ec38","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"e19cce88ec4c4877f4ff2469099b9cf23cc3e93e","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"a1f4dc72efc3204db95d052058d785cad7ce755f","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"6220694c52a5a04102b48109e4f24e958b559bd3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/p2pdma.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/p2pdma.c"]}],"references":["https://git.kernel.org/stable/c/baa42b756d183a59572f3890981a3d32b8d05d40","https://git.kernel.org/stable/c/51b7181cfbedf289ce794b6d97a1c596c309ec38","https://git.kernel.org/stable/c/e19cce88ec4c4877f4ff2469099b9cf23cc3e93e","https://git.kernel.org/stable/c/a1f4dc72efc3204db95d052058d785cad7ce755f","https://git.kernel.org/stable/c/6220694c52a5a04102b48109e4f24e958b559bd3"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45880.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45880","state":"PUBLISHED","datePublished":"2026-05-27T12:16:52.117Z","dateUpdated":"2026-05-27T12:16:52.117Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.082Z"},"containers":{"cna":{"title":"PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails","descriptions":[{"lang":"en","value":"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() 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()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"baa42b756d183a59572f3890981a3d32b8d05d40","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"51b7181cfbedf289ce794b6d97a1c596c309ec38","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"e19cce88ec4c4877f4ff2469099b9cf23cc3e93e","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"a1f4dc72efc3204db95d052058d785cad7ce755f","versionType":"git"},{"version":"7e9c7ef83d785236f5a8c3761dd053fae9b92fb8","status":"affected","lessThan":"6220694c52a5a04102b48109e4f24e958b559bd3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/p2pdma.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/p2pdma.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:16:52.117Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}