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CVE-2023-42753

HIGHCVSS 7.8/10EPSS 0.51%

Last modified

CVE-2023-42753 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system 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
0.51%

41.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 4.4.165, < 4.5
LinuxLinux Kernel>= 4.9.141, < 4.10
LinuxLinux Kernel>= 4.14.84, < 4.15
LinuxLinux Kernel>= 4.19.5, < 4.19.295
LinuxLinux Kernel>= 4.20, < 5.4.257
LinuxLinux Kernel>= 5.5, < 5.10.195
LinuxLinux Kernel>= 5.11, < 5.15.132
LinuxLinux Kernel>= 5.16, < 6.1.53
LinuxLinux Kernel>= 6.2, < 6.4.16
LinuxLinux Kernel>= 6.5, < 6.5.3
RedhatEnterprise Linux7.0
RedhatEnterprise Linux8.0
RedhatEnterprise Linux9.0
DebianDebian Linux10.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-42753?
An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.
How severe is CVE-2023-42753?
CVE-2023-42753 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.
How do I fix CVE-2023-42753?
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.

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Source: NVD / NIST