CVE•Published 2026-07-25•Modified 2026-07-27•1 article on news•5 live references•NVD data
CVE-2026-64391
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
11
Exploit Prediction Scoring System · top 89% of all CVEs
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.
Timeline
Published 2026-07-25
Modified 2026-07-27
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-64391Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-64391Censys host search filtered to this CVE id.
grep.app
CVE-2026-64391Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-64391GitHub code search for direct mentions.
Google dork
"CVE-2026-64391" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-64391 on GitHub.