CVE-2026-64391
CRITICAL
INFO
Priority: 0.04
BB Relevance:
80/100
Published: 2026-07-25
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
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.
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 222c4c52c3af2d0f68de31182710df3508a31095 |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 2ad5509dd576ae16d252d4698daf03002f9e0234 |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < a8f5d39971bbad9340d49cd41b0e2da9452a649d |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 2b4592cea214683de0f2ce6f8c22c097fb0ea1ab |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 52a56cf53ec834c44ac1b4d16d585f26613ee5ce |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < baa5e094886fffa7e6272edcb5e08be5ce28262c |
| Linux | Linux | 5.15 |
| linux | linux_kernel | 5.15 – 6.12.96 |