CVE-2026-64399
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
In the Linux kernel, the following vulnerability has been resolved: ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE The FSCTL_DUPLICATE_EXTENTS_TO_FILE arm of smb2_ioctl() overwrites the destination file's data via vfs_clone_file_range() with neither the share-level KSMBD_TREE_CONN_FLAG_WRITABLE check nor a per-handle fp->daccess check that the other write-bearing arms carry. A client can overwrite destination data on a read-only share, or from a handle opened with only FILE_WRITE_ATTRIBUTES (which still yields an FMODE_WRITE filp). FILE_WRITE_ATTRIBUTES-only destination handle overwrote the file's data via the clone. Add both checks, matching the FSCTL_SET_SPARSE permission fix; require FILE_WRITE_DATA since this writes data.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| eb817368f50c1cbe1bd07044124aad7db6330e3a | affected | git | bf460ad5958d506492de4524a656439da3f99c51 | Unavailable | None listed |
| eb817368f50c1cbe1bd07044124aad7db6330e3a | affected | git | 620d133d469295ee7c017ca6aafac335f65c4a5a | Unavailable | None listed |
| eb817368f50c1cbe1bd07044124aad7db6330e3a | affected | git | 9b9cf7e65cbeaae1b6636144bacee611cdd7a5d6 | Unavailable | None listed |
| eb817368f50c1cbe1bd07044124aad7db6330e3a | affected | git | baae7b39673ec21073a25e3d14f8feaada01d5df | Unavailable | None listed |
| eb817368f50c1cbe1bd07044124aad7db6330e3a | affected | git | c917e4522d251071dde9871b9142d8ea1186ebfe | Unavailable | None listed |
| eb817368f50c1cbe1bd07044124aad7db6330e3a | affected | git | 388e4139db27a9e3612c9d356b826f5b1ff6a9e3 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.15 | Unavailable | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.96 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.39 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.4 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |