{"id":"CVE-2026-80687","state":"PUBLISHED","title":"iommufd/viommu: Release the igroup lock on the vdevice_size error path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd/viommu: Release the igroup lock on the vdevice_size error path\n\niommufd_vdevice_alloc_ioctl() takes idev->igroup->lock, then validates the\ndriver's vdevice_size against the core structure size with a WARN_ON_ONCE.\nOn failure that guard jumps to out_put_idev, below out_unlock_igroup, so it\nskips the mutex_unlock(), leaving the igroup lock held and deadlocking the\nnext vDEVICE operation on that group.\n\nJump to out_unlock_igroup instead.","publishedAt":"2026-08-28T06:52:52.512Z","updatedAt":"2026-08-28T06:52:52.512Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ed42eee797ff3dc889ade63c1dd7c4f430699e23","status":"affected","lessThan":"294b464b2be7e57872864cb6936e1d9c7294f89d","versionType":"git"},{"version":"ed42eee797ff3dc889ade63c1dd7c4f430699e23","status":"affected","lessThan":"ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86","versionType":"git"},{"version":"ed42eee797ff3dc889ade63c1dd7c4f430699e23","status":"affected","lessThan":"339bd11591593ab7ce88136ab7fd01ef3813b724","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/iommufd/viommu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","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/iommu/iommufd/viommu.c"]}],"references":["https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d","https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86","https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80687.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80687","state":"PUBLISHED","datePublished":"2026-08-28T06:52:52.512Z","dateUpdated":"2026-08-28T06:52:52.512Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.784Z"},"containers":{"cna":{"title":"iommufd/viommu: Release the igroup lock on the vdevice_size error path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd/viommu: Release the igroup lock on the vdevice_size error path\n\niommufd_vdevice_alloc_ioctl() takes idev->igroup->lock, then validates the\ndriver's vdevice_size against the core structure size with a WARN_ON_ONCE.\nOn failure that guard jumps to out_put_idev, below out_unlock_igroup, so it\nskips the mutex_unlock(), leaving the igroup lock held and deadlocking the\nnext vDEVICE operation on that group.\n\nJump to out_unlock_igroup instead."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ed42eee797ff3dc889ade63c1dd7c4f430699e23","status":"affected","lessThan":"294b464b2be7e57872864cb6936e1d9c7294f89d","versionType":"git"},{"version":"ed42eee797ff3dc889ade63c1dd7c4f430699e23","status":"affected","lessThan":"ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86","versionType":"git"},{"version":"ed42eee797ff3dc889ade63c1dd7c4f430699e23","status":"affected","lessThan":"339bd11591593ab7ce88136ab7fd01ef3813b724","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/iommu/iommufd/viommu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","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/iommu/iommufd/viommu.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d"},{"url":"https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86"},{"url":"https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-28T06:52:52.512Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}