CVE-2026-64391
Linux Kernel Vulnerability in NetApp Products
CVE-2026-64391: Linux Kernel Vulnerability in NetApp Products. Not in the CISA KEV catalog. Critical advisory severity (CVSS 9.8, NetApp).
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Get an email when NetApp publishes the next one.
See NetApp's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
CVE-2026-64391 key facts
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- Critical
- CVSS base score
- 9.8 (NetApp)
- Weakness
- CWE-250
- VulniPulse record
- Published · Updated
Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-64391; bulletin-wide values are not repeated here.
Is CVE-2026-64391 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-64391 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-64391?
The tracked advisories that cover only this CVE do not list a fixed release yet. That does not mean no fix exists; check each vendor source below.
Vendor advisory comparison
NetApp
1 advisory- Advisory severityCritical9.8
Critical [CVE-2026-64391] Linux Kernel Vulnerability in NetApp Products
NTAP-20260814-0002Source published Source updated
Linux kernel versions 5.15 through 6.12.95, 6.13 through 6.18.38, and 6.19.0 through 7.1.3 are susceptible to a vulnerability which when successfully exploited could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- 5.15
- 6.12.95
- 6.13
- 6.18.38
2 more entries in the full advisory.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
Red Hat
1 advisory- Advisory severityUnrated
Advisory [CVE-2026-64391] use opener credentials for ADS I/O
CVE-2026-64391Source published Source updated
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. A flaw was found in ksmbd, the in-kernel Server Message Block (SMB) daemon. This vulnerability allows a remote attacker to bypass security restrictions by incorrectly handling credentials for Alternate Data Streams (ADS) input/output (I/O) operations. This misconfiguration can lead to a bypass of inode permissions and Linux Security Module (LSM) policies, potentially resulting in privilege…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
More NetApp advisories
- CVE-2026-101677Nov 4, 2026October 2026 MySQL Connector/J Vulnerabilities in NetApp Products
- CVE-2026-86140Nov 4, 2026Libxml2 Vulnerability in NetApp Products
- CVE-2026-15176Nov 4, 2026NGINX Vulnerability in NetApp Products
- CVE-2026-100105Nov 4, 2026Grafana Vulnerability in NetApp Products
- CVE-2026-93479Nov 4, 2026NGINX Vulnerability in NetApp Products
- CVE-2026-97205Nov 4, 2026NGINX Vulnerability in NetApp Products
Follow CVE-2026-64391 in the free weekly digest
Every Monday: whether it was added to CISA KEV, reported exploited, got a fix or changed severity, plus the week's critical and high advisories.
Browse the latest tracked CVEs or the CVEs listed in CISA KEV.
iPhone and Android apps · New on the App Store
Get alerts for new CVEs on your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
