{"id":"CVE-2026-64473","state":"PUBLISHED","title":"vfio: Remove device debugfs before releasing devres","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio: Remove device debugfs before releasing devres\n\nVFIO device debugfs files created with debugfs_create_devm_seqfile()\nstore a devres allocated debugfs_devm_entry as inode private data.\nvfio_unregister_group_dev() currently calls vfio_device_del() before\nvfio_device_debugfs_exit(), but device_del() releases devres.  This can\nleave debugfs entries visible with stale inode private data while\nunregister waits for userspace references to drain.\n\nRemove the per-device debugfs tree before vfio_device_del().  The debugfs\nview is diagnostic only, so losing it at the start of unregister is\npreferable to preserving entries whose backing storage may already have\nbeen released.\n\nComplete the teardown by clearing the per-device debugfs root after\nremoval.  This matches the global debugfs root cleanup and prevents\nfuture users from mistaking a removed dentry for a live debugfs tree\nduring the remainder of unregister.","publishedAt":"2026-07-25T08:51:36.702Z","updatedAt":"2026-08-17T04:56:19.303Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"6cc60b41d61657dc469893d14e8e55d160056ff1","versionType":"git"},{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"a53109ffb6b5148e11a27fb7670355b92db12dd3","versionType":"git"},{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"a5df401dc84f091e20b045560569f0736758fea7","versionType":"git"},{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"dc7fe87de492ea7f33a72b78d26650b75bf37f4f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vfio/debugfs.c","drivers/vfio/vfio_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vfio/debugfs.c","drivers/vfio/vfio_main.c"]}],"references":["https://git.kernel.org/stable/c/6cc60b41d61657dc469893d14e8e55d160056ff1","https://git.kernel.org/stable/c/a53109ffb6b5148e11a27fb7670355b92db12dd3","https://git.kernel.org/stable/c/a5df401dc84f091e20b045560569f0736758fea7","https://git.kernel.org/stable/c/dc7fe87de492ea7f33a72b78d26650b75bf37f4f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64473.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64473","state":"PUBLISHED","datePublished":"2026-07-25T08:51:36.702Z","dateUpdated":"2026-08-17T04:56:19.303Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.790Z"},"containers":{"cna":{"title":"vfio: Remove device debugfs before releasing devres","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio: Remove device debugfs before releasing devres\n\nVFIO device debugfs files created with debugfs_create_devm_seqfile()\nstore a devres allocated debugfs_devm_entry as inode private data.\nvfio_unregister_group_dev() currently calls vfio_device_del() before\nvfio_device_debugfs_exit(), but device_del() releases devres.  This can\nleave debugfs entries visible with stale inode private data while\nunregister waits for userspace references to drain.\n\nRemove the per-device debugfs tree before vfio_device_del().  The debugfs\nview is diagnostic only, so losing it at the start of unregister is\npreferable to preserving entries whose backing storage may already have\nbeen released.\n\nComplete the teardown by clearing the per-device debugfs root after\nremoval.  This matches the global debugfs root cleanup and prevents\nfuture users from mistaking a removed dentry for a live debugfs tree\nduring the remainder of unregister."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"6cc60b41d61657dc469893d14e8e55d160056ff1","versionType":"git"},{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"a53109ffb6b5148e11a27fb7670355b92db12dd3","versionType":"git"},{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"a5df401dc84f091e20b045560569f0736758fea7","versionType":"git"},{"version":"2202844e4468c7539dba0c0b06577c93735af952","status":"affected","lessThan":"dc7fe87de492ea7f33a72b78d26650b75bf37f4f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vfio/debugfs.c","drivers/vfio/vfio_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vfio/debugfs.c","drivers/vfio/vfio_main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6cc60b41d61657dc469893d14e8e55d160056ff1"},{"url":"https://git.kernel.org/stable/c/a53109ffb6b5148e11a27fb7670355b92db12dd3"},{"url":"https://git.kernel.org/stable/c/a5df401dc84f091e20b045560569f0736758fea7"},{"url":"https://git.kernel.org/stable/c/dc7fe87de492ea7f33a72b78d26650b75bf37f4f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:56:19.303Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}