medium 4.7

CVE-2023-46862 json

An issue was discovered in the Linux kernel through 6.5.9.

published 2023-10-29 3 y ago modified 2026-10-15 25 d ago also EUVD-2023-51028

cvss: 4.7; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits: 0; none known

An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur.

Patch / fix

fixed in 3 distros 6 links 2

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5

debian ubuntu red hat suse almalinux azure linux

linux Debian 12 6.1.64-1
linux Debian 14, Debian 13 6.5.10-1

debian advisories DEBIAN-CVE-2023-46862

linux Ubuntu 22.04 LTS 5.15.0-100.110
linux-aws Ubuntu 22.04 LTS 5.15.0-1056.61
linux-gcp Ubuntu 22.04 LTS 5.15.0-1053.61
linux-gke Ubuntu 22.04 LTS 5.15.0-1052.57
linux-ibm Ubuntu 22.04 LTS 5.15.0-1048.51
linux-kvm Ubuntu 22.04 LTS 5.15.0-1052.57
linux-azure Ubuntu 22.04 LTS 5.15.0-1058.66
linux-gkeop Ubuntu 22.04 LTS 5.15.0-1038.44

ubuntu advisories UBUNTU-CVE-2023-46862

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

kernel RHEL 9 5.14.0-427.13.1.el9_4
rv RHEL 9 5.14.0-427.13.1.el9_4
perf RHEL 9 5.14.0-427.13.1.el9_4
rtla RHEL 9 5.14.0-427.13.1.el9_4
bpftool RHEL 9 7.3.0-427.13.1.el9_4
libperf RHEL 9 5.14.0-427.13.1.el9_4
kernel-rt RHEL 9 5.14.0-427.13.1.el9_4
kernel-64k RHEL 9 5.14.0-427.13.1.el9_4

red hat advisories RHSA-2024:2394

dtb-aarch64 openSUSE Leap 15.4 5.14.21-150400.24.100.1
kernel-64kb SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 5.14.21-150400.24.100.2
kernel-syms SLE Module for Development Tools 15 SP4, openSUSE Leap 15.4 5.14.21-150400.24.100.1
kernel-obs-qa openSUSE Leap 15.4 5.14.21-150400.24.100.1
kernel-source SLE Module for Development Tools 15 SP4, SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 5.14.21-150400.24.100.2
kernel-default SLE Workstation Extension 15 SP4, SLE Module for Legacy 15 SP4, SLE Module for Basesystem 15 SP4 +7 more 5.14.21-150400.24.100.2
kernel-kvmsmall openSUSE Leap 15.4 5.14.21-150400.24.100.2
kernel-zfcpdump SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 5.14.21-150400.24.100.2

suse advisories SUSE-SU-2023:4810-1 SUSE-SU-2023:4782-1 SUSE-SU-2023:4734-1 SUSE-SU-2023:4732-1 SUSE-SU-2023:4731-1 SUSE-SU-2023:4730-1

kernel AlmaLinux 9 5.14.0-427.13.1.el9_4
rv AlmaLinux 9 5.14.0-427.13.1.el9_4
perf AlmaLinux 9 5.14.0-427.13.1.el9_4
rtla AlmaLinux 9 5.14.0-427.13.1.el9_4
bpftool AlmaLinux 9 7.3.0-427.13.1.el9_4
libperf AlmaLinux 9 5.14.0-427.13.1.el9_4
kernel-rt AlmaLinux 9 5.14.0-427.13.1.el9_4
kernel-64k AlmaLinux 9 5.14.0-427.13.1.el9_4

almalinux advisories ALSA-2024:2394

kernel CBL-Mariner 2.0 5.15.143.1-1

azure linux advisories AZL-31816

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

github.com/torvalds/linux@7644b1a commit
bugzilla.kernel.org/show_bug.cgi?id=218032#c4 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-46862 updated 2026-11-07 cvss 5.5

kernel: NULL pointer dereference vulnerability in io_uring_show_fdinfo

Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.13.1.el9_4, perf 5.14.0-427.13.1.el9_4, rtla 5.14.0-427.13.1.el9_4, kernel-devel-matched 5.14.0-427.13.1.el9_4, kernel-64k-devel-matched 5.14.0-427.13.1.el9_4, kernel-debug-devel-matched 5.14.0-427.13.1.el9_4, +6 more Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.13.1.el9_4, kernel 5.14.0-427.13.1.el9_4, kernel-64k 5.14.0-427.13.1.el9_4, kernel-core 5.14.0-427.13.1.el9_4, kernel-tools 5.14.0-427.13.1.el9_4, python3-perf 5.14.0-427.13.1.el9_4, +28 more Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.13.1.el9_4 Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-kvm 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, +6 more Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, kernel-rt-modules-core 5.14.0-427.13.1.el9_4, kernel-rt-debug-modules 5.14.0-427.13.1.el9_4, +4 more
fixed: vendor fix RHSA-2024:2394
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated 2025-08-12 cvss 4.7

Siemens SIMATIC S7-1500

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

CWE-476 NULL Pointer Dereference

Technology feeds

Linux kernel rss critical rss

References

github.com /torvalds/linux/commit/7644b1a1c9a7ae8ab99175989bfc8676055edb46
patch
bugzilla.kernel.org /show_bug.cgi?id=218032#c4
issue-tracking, patch, third-party-advisory
lists.debian.org /debian-lts-announce/2024/01/msg00005.html
mailing-list
cert-portal.siemens.com /productcert/html/ssa-398330.html

Sources

CVE List CVE-2023-46862
NVD CVE-2023-46862

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary