CVE-2023-42753 evidence review

Red Hat Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 8

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.

Open CVE record

Evidence review

This record remains available for product and version identification, but it is not presented as a complete remediation procedure. Confirm the affected range and the supported fix in a direct vendor advisory before changing production systems.

ProductRed Hat Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 8

Affected versions>= 4.4.165 < 4.5, >= 4.9.141 < 4.10, >= 4.14.84 < 4.15, >= 4.19.5 < 4.19.295, >= 4.20 < 5.4.257, >= 5.5 < 5.10.195, >= 5.11 < 5.15.132, >= 5.16 < 6.1.53, >= 6.2 < 6.4.16, >= 6.5 < 6.5.3, 7.0, 8.0, 9.0, 10.0

Fixed versionsVerify the fixed release separately for each affected product line

Priority basisReview · CVSS 7.8 · EPSS 0.51%

Identify the product and installed version

Record whether Red Hat Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 8 is present, where it is installed, and which interfaces are exposed.

Record the product name, package or appliance identifier, and installed version.
Identify internet-facing, administrative, API, and internal access paths.
Preserve the pre-change configuration and relevant service logs.

Compare the affected range

Use the current record as an identification aid: >= 4.4.165 < 4.5, >= 4.9.141 < 4.10, >= 4.14.84 < 4.15, >= 4.19.5 < 4.19.295, >= 4.20 < 5.4.257, >= 5.5 < 5.10.195, >= 5.11 < 5.15.132, >= 5.16 < 6.1.53, >= 6.2 < 6.4.16, >= 6.5 < 6.5.3, 7.0, 8.0, 9.0, 10.0. Resolve incomplete inventory results before deciding that an asset is unaffected.

Verify the authoritative remediation source

Open the linked source material and locate a direct vendor advisory for this CVE. Confirm the supported fixed release and product-specific update path before making a production change.

Operational boundary

This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.