In the Linux kernel, the following vulnerability has been resolved:
virtiofs: fix UAF on submount umount
iput() called from fuse_release_end() can Oops if the super block has already been destroyed. Normally this is prevented by waiting for num_waiting to go down to zero before commencing with super block shutdown.
This only works, however, for the last submount instance, as the wait counter is per connection, not per superblock.
Revert to using synchronous release requests for the auto_submounts case, which is virtiofs only at this time.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-toolsUpgrade kernel-livepatch-5.10.260-259.1053Upgrade kernel-livepatch-5.15.211-149.249Upgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernel-debuginfoUpgrade python-perfUpgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade perf | Aug 2, 2026 | Aug 2, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel6.18-tools-develUpgrade kernel6.18-headersUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.12-tools-debuginfoUpgrade kernel-livepatch-6.12.95-124.187Upgrade bpftool6.18-debuginfoUpgrade perf6.12Upgrade kernel6.18-develUpgrade python3-perf6.12-debuginfoUpgrade perf6.18Upgrade kernel6.18-debuginfoUpgrade bpftool6.12Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.18Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-headersUpgrade python3-perf6.12Upgrade bpftool6.18Upgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.18-modules-extraUpgrade microvm-kernel6.18Upgrade python3-perf6.18Upgrade kernel-livepatch-6.18.38-73.137Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.12-tools-develUpgrade kernel6.12Upgrade perf6.12-debuginfoUpgrade kernel6.18-toolsUpgrade kernel6.12-debuginfo-common-aarch64Upgrade perf6.18-debuginfoUpgrade kernel6.12-toolsUpgrade kernel6.12-modules-extraUpgrade kernel6.12-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade kernel6.12-develUpgrade bpftool6.12-debuginfoUpgrade kernel6.18-tools-debuginfo | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Jul 20, 2026 | Jul 20, 2026 |
| Redhat_linux | — | No solution exists | Jul 22, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-generic-7.0Upgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-oem-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-aws-64kUpgrade linux-image-raspiUpgrade linux-image-realtimeUpgrade linux-image-nvidia-7.0Upgrade linux-image-oem-26.04aUpgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-realtime-hwe-26.04Upgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-oracle-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-31-genericUpgrade linux-image-gcpUpgrade linux-image-generic-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-generic-64k-7.0Upgrade linux-image-nvidia-64kUpgrade linux-image-oem-26.04Upgrade linux-image-realtime-64kUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-azure-7.0Upgrade linux-image-gcp-64kUpgrade linux-image-nvidia-bosUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-azureUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-gke-64k-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-7.0.0-1012-awsUpgrade linux-image-gkeUpgrade linux-image-awsUpgrade linux-image-generic-hwe-26.04Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-gke-7.0Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-realtime-7.0Upgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-azure-lts-26.04Upgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-genericUpgrade linux-image-oem-26.04bUpgrade linux-image-aws-7.0Upgrade linux-image-virtualUpgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-raspi-7.0Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-nvidiaUpgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-7.0.0-1013-oemUpgrade linux-image-virtual-7.0Upgrade linux-image-oracleUpgrade linux-image-gke-hwe-26.04Upgrade linux-image-gke-64kUpgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-gcp-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-ibm | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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