CVE-2026-64391
ksmbd: use opener credentials for ADS I/O
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for ADS I/O Alternate data streams are stored as xattrs. Unlike regular file I/O, their read and write paths therefore call VFS xattr helpers which recheck inode permissions and LSM policy using the current task credentials. Run ADS I/O with the credentials captured when the SMB handle was opened.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 25, 2026 |
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Affected Versions
Linux / Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a8f5d39971bbad9340d49cd41b0e2da9452a649d 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2b4592cea214683de0f2ce6f8c22c097fb0ea1ab 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 52a56cf53ec834c44ac1b4d16d585f26613ee5ce 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < baa5e094886fffa7e6272edcb5e08be5ce28262c 0 < 6.12.96 0 < 6.18.39 0 < 7.1.4
Linux / Linux
All versions affected References
git.kernel.org: https://git.kernel.org/stable/c/a8f5d39971bbad9340d49cd41b0e2da9452a649d git.kernel.org: https://git.kernel.org/stable/c/2b4592cea214683de0f2ce6f8c22c097fb0ea1ab git.kernel.org: https://git.kernel.org/stable/c/52a56cf53ec834c44ac1b4d16d585f26613ee5ce git.kernel.org: https://git.kernel.org/stable/c/baa5e094886fffa7e6272edcb5e08be5ce28262c