medium 6.3

CVE-2023-1855 json

A use-after-free flaw was found in xgene_hwmon_remove in drivers/hwmon/xgene-hwmon.c in the Hardware Monitoring Linux Kernel Driver (xgene-…

published 2023-04-05 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-24057

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits: 0; none known

A use-after-free flaw was found in xgene_hwmon_remove in drivers/hwmon/xgene-hwmon.c in the Hardware Monitoring Linux Kernel Driver (xgene-hwmon). This flaw could allow a local attacker to crash the system due to a race problem. This vulnerability could even lead to a kernel information leak problem.

Patch / fix

fixed in 1 distros 6 links 1

linux linux_kernel 4.14.311, 4.19.279, 5.4.238, 5.10.176, 5.15.104, 6.1.21, 6.2.8, 6.3

debian ubuntu red hat suse almalinux azure linux

linux Debian 14, Debian 13, Debian 12 6.1.20-2

debian advisories DEBIAN-CVE-2023-1855

linux Ubuntu 20.04 LTS 5.4.0-156.173
linux Ubuntu 22.04 LTS 5.15.0-79.86
linux-aws Ubuntu 20.04 LTS 5.4.0-1107.115
linux-aws Ubuntu 22.04 LTS 5.15.0-1042.47
linux-gcp Ubuntu 20.04 LTS 5.4.0-1110.119
linux-gcp Ubuntu 22.04 LTS 5.15.0-1039.47
linux-gke Ubuntu 20.04 LTS 5.4.0-1105.112
linux-gke Ubuntu 22.04 LTS 5.15.0-1039.44

ubuntu advisories UBUNTU-CVE-2023-1855

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

perf rhev hypervisor 4.4, RHEL 8.6 EUS 4.18.0-372.87.1.el8_6
kernel RHEL 8 4.18.0-513.5.1.el8_9
perf RHEL 8 4.18.0-513.5.1.el8_9
bpftool RHEL 8 4.18.0-513.5.1.el8_9
kernel-core RHEL 8 4.18.0-513.5.1.el8_9
kernel-tools RHEL 8 4.18.0-513.5.1.el8_9
python3-perf RHEL 8 4.18.0-513.5.1.el8_9
kernel-modules RHEL 8 4.18.0-513.5.1.el8_9

red hat advisories RHSA-2024:0412 RHSA-2023:7077 RHSA-2023:6583 RHSA-2023:6901 RHSA-2024:0575

dtb-aarch64 openSUSE Leap 15.5 5.14.21-150500.55.7.1
kernel-64kb SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.7.1
kernel-syms SLE Module for Development Tools 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.7.1
kernel-obs-qa openSUSE Leap 15.5 5.14.21-150500.55.7.1
kernel-source SLE Module for Development Tools 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.7.1
kernel-default SLE Workstation Extension 15 SP5, SLE Module for Legacy 15 SP5, SLE Module for Basesystem 15 SP5 +3 more 5.14.21-150500.55.7.1
kernel-kvmsmall openSUSE Leap 15.5 5.14.21-150500.55.7.1
kernel-zfcpdump SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.14.21-150500.55.7.1

suse advisories SUSE-SU-2023:2871-1 SUSE-SU-2023:2809-1 SUSE-SU-2023:2232-1 SUSE-SU-2023:2646-1 SUSE-SU-2023:2231-1 SUSE-SU-2023:2163-1

kernel AlmaLinux 8 4.18.0-513.5.1.el8_9
perf AlmaLinux 8 4.18.0-513.5.1.el8_9
bpftool AlmaLinux 8 4.18.0-513.5.1.el8_9
kernel-core AlmaLinux 8 4.18.0-513.5.1.el8_9
kernel-tools AlmaLinux 8 4.18.0-513.5.1.el8_9
python3-perf AlmaLinux 8 4.18.0-513.5.1.el8_9
kernel-modules AlmaLinux 8 4.18.0-513.5.1.el8_9
kernel-zfcpdump AlmaLinux 8 4.18.0-513.5.1.el8_9

almalinux advisories ALSA-2023:7077

kernel CBL-Mariner 2.0 5.15.107.1-2
hyperv-daemons CBL-Mariner 2.0 5.15.107.1-1

azure linux advisories AZL-26033 AZL-26142

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@cb090e6 commit

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-2023-1855 updated 2026-11-07 cvss 6.4

kernel: use-after-free bug in remove function xgene_hwmon_remove

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
affected: workaround, no fix available
Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-513.5.1.el8_9, kernel-debuginfo-common-aarch64 4.18.0-513.5.1.el8_9, kernel-debuginfo-common-ppc64le 4.18.0-513.5.1.el8_9
fixed: vendor fix RHSA-2023:7077
Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-s390x 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-x86_64 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-aarch64 5.14.0-362.8.1.el9_3, kernel-debuginfo-common-ppc64le 5.14.0-362.8.1.el9_3
fixed: vendor fix RHSA-2023:6583
Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.87.1.el8_6
fixed: vendor fix RHSA-2024:0412
Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.43.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.43.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.43.1.el8_8
fixed: vendor fix RHSA-2024:0575
Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-362.8.1.el9_3, perf 5.14.0-362.8.1.el9_3, rtla 5.14.0-362.8.1.el9_3, kernel-devel-matched 5.14.0-362.8.1.el9_3, kernel-64k-devel-matched 5.14.0-362.8.1.el9_3, kernel-debug-devel-matched 5.14.0-362.8.1.el9_3, +6 more
fixed: vendor fix RHSA-2023:6583
Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-513.5.1.el8_9, kernel 4.18.0-513.5.1.el8_9, bpftool 4.18.0-513.5.1.el8_9, kernel-core 4.18.0-513.5.1.el8_9, kernel-tools 4.18.0-513.5.1.el8_9, python3-perf 4.18.0-513.5.1.el8_9, +15 more
fixed: vendor fix RHSA-2023:7077
Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.2.0-362.8.1.el9_3, kernel 5.14.0-362.8.1.el9_3, kernel-64k 5.14.0-362.8.1.el9_3, kernel-core 5.14.0-362.8.1.el9_3, kernel-tools 5.14.0-362.8.1.el9_3, python3-perf 5.14.0-362.8.1.el9_3, +28 more
fixed: vendor fix RHSA-2023:6583

show 8 more

Red Hat Enterprise Linux BaseOS EUS (v.8.6) perf 4.18.0-372.87.1.el8_6, kernel 4.18.0-372.87.1.el8_6, bpftool 4.18.0-372.87.1.el8_6, kernel-core 4.18.0-372.87.1.el8_6, kernel-tools 4.18.0-372.87.1.el8_6, python3-perf 4.18.0-372.87.1.el8_6, +15 more
fixed: vendor fix RHSA-2024:0412
Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.43.1.el8_8, kernel 4.18.0-477.43.1.el8_8, bpftool 4.18.0-477.43.1.el8_8, kernel-core 4.18.0-477.43.1.el8_8, kernel-tools 4.18.0-477.43.1.el8_8, python3-perf 4.18.0-477.43.1.el8_8, +15 more
fixed: vendor fix RHSA-2024:0575
Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-core 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-modules 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-core 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-modules 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-modules-extra 4.18.0-513.5.1.rt7.307.el8_9, +2 more
fixed: vendor fix RHSA-2023:6901
Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-362.8.1.el9_3, kernel-rt-core 5.14.0-362.8.1.el9_3, kernel-rt-modules 5.14.0-362.8.1.el9_3, kernel-rt-debug-core 5.14.0-362.8.1.el9_3, kernel-rt-modules-core 5.14.0-362.8.1.el9_3, kernel-rt-debug-modules 5.14.0-362.8.1.el9_3, +4 more
fixed: vendor fix RHSA-2023:6583
Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-kvm 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-core 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-modules 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-kvm 4.18.0-513.5.1.rt7.307.el8_9, kernel-rt-debug-core 4.18.0-513.5.1.rt7.307.el8_9, +4 more
fixed: vendor fix RHSA-2023:6901
Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-362.8.1.el9_3, kernel-rt-kvm 5.14.0-362.8.1.el9_3, kernel-rt-core 5.14.0-362.8.1.el9_3, kernel-rt-modules 5.14.0-362.8.1.el9_3, kernel-rt-debug-kvm 5.14.0-362.8.1.el9_3, kernel-rt-debug-core 5.14.0-362.8.1.el9_3, +6 more
fixed: vendor fix RHSA-2023:6583
Red Hat Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.87.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.87.1.el8_6
fixed: vendor fix RHSA-2024:0412
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
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-24-046-11 updated 2024-02-13 cvss 6.3

Siemens SCALANCE XCM-/XRM-300

Siemens SCALANCE XCH328 (6GK5328-4TS01-2EC2) <V2.4 Siemens SCALANCE XCM324 (6GK5324-8TS01-2AC2) <V2.4 Siemens SCALANCE XCM328 (6GK5328-4TS01-2AC2) <V2.4 Siemens SCALANCE XCM332 (6GK5332-0GA01-2AC2) <V2.4 Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3) <V2.4 Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3) <V2.4

+5 more productsfewer

Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3) <V2.4 Siemens SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3) <V2.4 Siemens SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3) <V2.4 Siemens SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3) <V2.4 Siemens SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3) <V2.4

affected: fixed in V2.4 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

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-02-12)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.3	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD	3.1	6.3	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
CNA	3.1	6.3	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

n/a Kernel

Classification

Weakness

CWE-416 Use After Free

Technology feeds

Linux kernel rss critical rss

References

github.com /torvalds/linux/commit/cb090e64cf25602b9adaf32d5dfc9c8bec493cd1
patch
lore.kernel.org /all/20230318122758.2140868-1-linux%40roeck-us.net/
lists.debian.org /debian-lts-announce/2023/05/msg00005.html
mailing-list, third-party-advisory
lists.debian.org /debian-lts-announce/2023/05/msg00006.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2023-1855
NVD CVE-2023-1855

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