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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 (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 (10)

Product Vendor Version
Red Hat Enterprise Linux 9 Red Hat <= 6.0.4
Red Hat Enterprise Linux 7 Red Hat < 5beb85ff7d005ddb7bf604a4f2dc76f01b84b318
Red Hat Enterprise Linux 9 Red Hat < 258639bc55a586ee6df92d89786ccf1c71546d70
Red Hat Enterprise Linux 6 Red Hat <= <= 2.1.5
Red Hat Enterprise Linux 7 Red Hat <= <= 1.0
Red Hat Enterprise Linux 6 Red Hat < 4d6295b6d986476232332fffd08575b185f90d81
Red Hat Enterprise Linux 8 Red Hat <= < 4.7.16
Red Hat Enterprise Linux 9 Red Hat < 222292930c8ecc3516e03ec1f9fa8448be7ff496
Red Hat Enterprise Linux 8 Red Hat <= 3.5.5
Red Hat Enterprise Linux 7 Red Hat <= 6.0.4

References (22)