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CVE-2023-42753

Kernel: netfilter: potential slab-out-of-bound access due to integer underflow

Published: 9/25/2023 Last updated: 2/18/2026 Reserved: 9/13/2023

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 7 High CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (7)

Product Vendor Version
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < 7d596bbc66a52ff2c7a83d7e0ee840cb07e2a045
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Red Hat < 5.19
Red Hat Enterprise Linux 6 Red Hat <= 6.1.*
Red Hat Enterprise Linux 9 Red Hat <= *
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < f5f94b9c8b805d87ff185caf9779c3a4d07819e3
Red Hat Enterprise Linux 7 Red Hat <= *
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat 5.19

References (120)