In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTL_SET_ZERO_DATA FSCTL_SET_ZERO_DATA in smb2_ioctl() destroys file data via ksmbd_vfs_zero_d…
High CVSS 8.1
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTL_SET_ZERO_DATA FSCTL_SET_ZERO_DATA in smb2_ioctl() destroys file data via ksmbd_vfs_zero_data() -> vfs_fallocate(PUNCH_HOLE/ZERO_RANGE) after checking only the share-level KSMBD_TREE_CONN_FLAG_WRITABLE, with no per-handle access check. A handle opened with only FILE_WRITE_ATTRIBUTES still yields an FMODE_WRITE filp (FILE_WRITE_ATTRIBUTES is part of FILE_WRITE_DESIRE_ACCESS_LE, so smb2_cr…
In-depth triage
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Sources
- NVD DATABASE
Original Links
- https://git.kernel.org/stable/c/25377f369688dd0bd814dc8965ed26d44238ecaa
- https://git.kernel.org/stable/c/3072d82461f498c85daea8766e9d8bfbada31605
- https://git.kernel.org/stable/c/3320ba068198adc144c89d6661b805acce01735b
- https://git.kernel.org/stable/c/57f2042fd87d7ce8fc3ac8b6c176e554df68b1a7
- https://git.kernel.org/stable/c/ca53bb17f4e8232cfaece3953d3cef62c559b039
- https://git.kernel.org/stable/c/deffa929086d7902e30918adf3dd27ccfe9c08b1
Timeline
- nvd_ingest NVD