In the Linux kernel, the following vulnerability has been resolved:
ksmbd: serialize QUERY_DIRECTORY requests per file
smb2_query_dir() stores a pointer to its stack-allocated private data in the ksmbd_file readdir_data. Concurrent QUERY_DIRECTORY requests using the same file handle can overwrite this pointer while an iterate_dir() callback is still using it, resulting in a stack use-after-free.
Add a per-file mutex and hold it while accessing the shared directory enumeration state. The lock covers scan restart, dot entry state, readdir_data setup and iteration, and response construction. This prevents another request from replacing readdir_data.private before the current request has finished using it and also serializes the shared file position.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux-6.1Upgrade linux | Jul 28, 2026 | Jul 28, 2026 |
| Ubuntu | — | Upgrade linux-image-ibm-7.0Upgrade linux-image-raspiUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-ibmUpgrade linux-image-generic-64kUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-nvidia-7.0Upgrade linux-image-oem-7.0Upgrade linux-image-oem-26.04aUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-7.0.0-31-genericUpgrade linux-image-7.0.0-1012-awsUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-gke-64k-7.0Upgrade linux-image-generic-64k-7.0Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-aws-64kUpgrade linux-image-nvidia-tegraUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-6.8.0-1035-nvidia-tegra-rtUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-7.0.0-1013-oemUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1035-nvidia-tegraUpgrade linux-image-genericUpgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-gcp-64kUpgrade linux-image-oem-26.04Upgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-64kUpgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-gkeUpgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-virtualUpgrade linux-image-aws-64k-7.0Upgrade linux-image-realtime-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-oem-26.04bUpgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-virtual-7.0Upgrade linux-image-gke-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-realtimeUpgrade linux-image-gke-7.0Upgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-raspi-7.0Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-generic-7.0Upgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-realtime-64kUpgrade linux-image-awsUpgrade linux-image-gke-64k-hwe-26.04 | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 31, 2026 | Jul 25, 2026 |
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