medium 5.5

CVE-2023-31084 json

An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel 6.2.

published 2023-04-24 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35413

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel 6.2. There is a blocking operation when a task is in !TASK_RUNNING. In dvb_frontend_get_event, wait_event_interruptible is called; the condition is dvb_frontend_test_event(fepriv,events). In dvb_frontend_test_event, down(&fepriv->sem) is called. However, wait_event_interruptible would put the process to sleep, and down(&fepriv->sem) may block the process.

Patch / fix

distros 7 links 1

debian ubuntu red hat suse opensuse almalinux azure linux

linux Debian 12 6.1.37-1
linux Debian 14, Debian 13 6.3.7-1

debian advisories DEBIAN-CVE-2023-31084

linux Ubuntu 20.04 LTS 5.4.0-162.179
linux Ubuntu 22.04 LTS 5.15.0-83.92
linux-aws Ubuntu 20.04 LTS 5.4.0-1109.118
linux-aws Ubuntu 22.04 LTS 5.15.0-1044.49
linux-gcp Ubuntu 20.04 LTS 5.4.0-1112.121
linux-gcp Ubuntu 22.04 LTS 5.15.0-1041.49
linux-gke Ubuntu 22.04 LTS 5.15.0-1041.46
linux-ibm Ubuntu 20.04 LTS 5.4.0-1056.61

ubuntu advisories UBUNTU-CVE-2023-31084

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 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
kernel-zfcpdump RHEL 8 4.18.0-513.5.1.el8_9

red hat advisories RHSA-2024:1404 RHSA-2023:7077 RHSA-2024:0930 RHSA-2023:6901

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-2023:2782-1 SUSE-SU-2023:2653-1 SUSE-SU-2023:2651-1 SUSE-SU-2023:2646-1

kernel-source openSUSE Tumbleweed 6.3.7-1.1
kernel-source openSUSE Tumbleweed 6.6.17-1.1

opensuse advisories openSUSE-SU-2024:12994-1 openSUSE-SU-2024:13704-1

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

hyperv-daemons CBL-Mariner 2.0 5.15.158.2-1
hyperv-daemons Azure Linux 3.0 6.6.35.1-1

azure linux advisories AZL-28505 AZL-34803

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

git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b8c75e… 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-2023-31084 updated 2026-11-08 cvss 5.5

kernel: blocking operation in dvb_frontend_get_event and wait_event_interruptible

Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-selftests-internal
affected: no fix planned “Will not fix”
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 EUS (v.8.6) kernel-debuginfo-common-x86_64 4.18.0-372.93.1.el8_6, kernel-debuginfo-common-aarch64 4.18.0-372.93.1.el8_6, kernel-debuginfo-common-ppc64le 4.18.0-372.93.1.el8_6
fixed: vendor fix RHSA-2024:0930
Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.51.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.51.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.51.1.el8_8
fixed: vendor fix RHSA-2024:1404
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 EUS (v.8.6) perf 4.18.0-372.93.1.el8_6, kernel 4.18.0-372.93.1.el8_6, bpftool 4.18.0-372.93.1.el8_6, kernel-core 4.18.0-372.93.1.el8_6, kernel-tools 4.18.0-372.93.1.el8_6, python3-perf 4.18.0-372.93.1.el8_6, +15 more
fixed: vendor fix RHSA-2024:0930
Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.51.1.el8_8, kernel 4.18.0-477.51.1.el8_8, bpftool 4.18.0-477.51.1.el8_8, kernel-core 4.18.0-477.51.1.el8_8, kernel-tools 4.18.0-477.51.1.el8_8, python3-perf 4.18.0-477.51.1.el8_8, +15 more
fixed: vendor fix RHSA-2024:1404

show 3 more

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 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 Virtualization 4 Hypervisor for RHEL 8 perf 4.18.0-372.93.1.el8_6, kernel-debuginfo-common-x86_64 4.18.0-372.93.1.el8_6
fixed: vendor fix RHSA-2024:0930
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 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 5.5

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 (2025-03-06)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness

CWE-833 Deadlock

Technology feeds

Linux kernel rss critical rss

References

git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b8c75e4a1b325ea0a9433fa8834be97b5836b946
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/AOATNX5UFL7V7W2QDIQKOHFFHYKWFP4W/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/6HIEOLEOURP4BJZMIL7UGGPYRRB44UDN/
vendor-advisory
debian.org /security/2023/dsa-5448
vendor-advisory, third-party-advisory
debian.org /security/2023/dsa-5480
vendor-advisory, third-party-advisory
lore.kernel.org /all/CA+UBctCu7fXn4q41O_3=id1+OdyQ85tZY1x+TkT-6OVBL6KAUw%40mail.gmail.com/
lists.debian.org /debian-lts-announce/2023/07/msg00030.html
mailing-list, third-party-advisory
security.netapp.com /advisory/ntap-20230929-0003/
third-party-advisory
lists.debian.org /debian-lts-announce/2023/10/msg00027.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2023-31084
NVD CVE-2023-31084

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