Critical· 9.8official fix available
CVE-2023-53382
A critical NULL pointer dereference vulnerability in the Linux kernel's SMCRv2 handling causes crashes when switching from SMCRv2 to SMCRv1 during network connection setup. This occurs due to improper resource cleanup, leading to invalid memory access.
publishedSep 18, 2025
last modifiedAug 4, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
19th 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 Sep 3, 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 (specifically versions 6.4 and related distributions)
02
Real-world impact
Could allow attackers to cause system crashes or denial of service on vulnerable systems.
03
Why this severity
CVSS 9.8 (critical) due to high confidence in exploitability and potential system instability.
04
What to do about it
official fix available
recommended steps
- 01Upgrade the Linux kernel to a patched version that includes the fix for CVE-2023-53382.
NVD-referenced vendor advisory (Linux kernel patch)
05
Timeline
- Sep 18, 2025 · Sep 18, 2025PublishedDisclosed and added to the National Vulnerability Database.
- Aug 4, 2026 · 1d agoAdvisory updatedThe NVD record was last revised.
- Aug 4, 2026 · 1d 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
References & advisories
(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 →