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CVE-2023-39192

Kernel: netfilter: xtables out-of-bounds read in u32_match_it()

Published: 10/9/2023 Last updated: 11/8/2025 Reserved: 7/25/2023

A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.

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

Metrics

Version Score Severity Vector String
3.1 6.7 Medium CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L

Opam packages affected (27)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes orun rawlink rawlink-eio rawlink-lwt 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 (14)

Product Vendor Version
Red Hat Enterprise Linux 8 Red Hat before 4.4.2
Red Hat Enterprise Linux 6 Red Hat < 1.7.0
Red Hat Enterprise Linux 7 Red Hat < 3.21.0
Red Hat Enterprise Linux 8 Red Hat 2008 for x64-based Systems Service Pack 2 (Core installation)
Red Hat Enterprise Linux 9 Red Hat < 1.14.0
Red Hat Enterprise Linux 9 Red Hat < 1.6.7
Red Hat Enterprise Linux 6 Red Hat >= 8.2.8
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat < 10.0.17763.3406
Red Hat Enterprise Linux 7 Red Hat 2008 R2 for Itanium-Based Systems Service Pack 1
Red Hat Enterprise Linux 9 Red Hat >= 8.2.9
Red Hat Enterprise Linux 8 Red Hat 1.5
Red Hat Enterprise Linux 7 Red Hat < 2.23.0
Red Hat Enterprise Linux 8 Red Hat n/a

References (22)