CVE-2023-3812
HIGHCVSS 7.8/10EPSS 0.34%
Last modified
CVE-2023-3812 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.
Description
An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.15, < 4.19.265 |
| Linux | Linux Kernel | >= 4.20, < 5.4.224 |
| Linux | Linux Kernel | >= 5.5, < 5.10.154 |
| Linux | Linux Kernel | >= 5.11, < 5.15.78 |
| Linux | Linux Kernel | >= 5.16, < 6.0.8 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
References
- https://access.redhat.com/errata/RHSA-2023:6799Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:6813Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7370Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7379Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7382Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7389Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7411Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7418Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7548Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7549Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7554Third Party Advisory, VDB Entry
- https://access.redhat.com/security/cve/CVE-2023-3812Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2224048Issue Tracking, Patch, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6799Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:6813Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7370Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7379Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7382Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7389Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7411Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7418Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7548Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7549Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2023:7554Third Party Advisory, VDB Entry
- https://access.redhat.com/security/cve/CVE-2023-3812Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2224048Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-3812?
An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.
How severe is CVE-2023-3812?
CVE-2023-3812 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2023-3812?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-3812?
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Scan your code nowSource: NVD / NIST