Critical· 9.8official fix available
CVE-2026-64384
CVE-2026-64384 is a critical Linux kernel vulnerability in the SMB client component that allows a double-free error when handling replayable errors in change notifications, risking system crashes or instability.
publishedJul 25, 2026
last modifiedJul 27, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
37th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 26, 2026
An official fix is available, so this entry is kept for 30 days and then removed automatically.
01
Who is affected
Linux kernel users (SMB client component)
02
Real-world impact
High risk of system crashes or instability due to memory corruption.
03
Why this severity
CVSS 9.8 (critical): High confidence in exploitation potential and severe impact on confidentiality, integrity, and availability.
04
What to do about it
official fix available
recommended steps
- 011. Upgrade the Linux kernel to a version that includes the fix for CVE-2026-64384.
NVD description stating the vulnerability has been resolved in the Linux kernel.
05
Timeline
- Jul 25, 2026 · 7d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 27, 2026 · 5d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
06
How it’s attacked
Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →