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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-64391 ↗
- git.kernel.org/stable/c/222c4c52c3af2d0f68de31182710df3508a31095 ↗
- git.kernel.org/stable/c/2ad5509dd576ae16d252d4698daf03002f9e0234 ↗
- git.kernel.org/stable/c/2b4592cea214683de0f2ce6f8c22c097fb0ea1ab ↗
- git.kernel.org/stable/c/52a56cf53ec834c44ac1b4d16d585f26613ee5ce ↗
- git.kernel.org/stable/c/a8f5d39971bbad9340d49cd41b0e2da9452a649d ↗
- git.kernel.org/stable/c/baa5e094886fffa7e6272edcb5e08be5ce28262c ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.