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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
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.34%

26.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 4.15, < 4.19.265
LinuxLinux Kernel>= 4.20, < 5.4.224
LinuxLinux Kernel>= 5.5, < 5.10.154
LinuxLinux Kernel>= 5.11, < 5.15.78
LinuxLinux Kernel>= 5.16, < 6.0.8
RedhatEnterprise Linux8.0
RedhatEnterprise Linux9.0

References

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.

Are you affected by CVE-2023-3812?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST