A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module.

published 2023-03-16 3 y ago modified 2026-09-18 51 d ago also EUVD-2023-23646

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 5.1%; EPSS 5.1% chance of exploitation in 30 days, percentile 92%
public exploits: 0; none known

A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in tipc_link_xmit() hits an unknown state while attempting to parse SKBs, which are not in the queue. Sending two small UDP packets to a system with a UDP bearer results in the CPU utilization for the system to instantly spike to 100%, causing a denial of service condition.

Patch / fix

fixed in 1 distros 4 links 1

linux linux_kernel 4.9.253, 4.14.217, 4.19.170, 5.4.92, 5.10.10

debian ubuntu red hat suse

linux Debian 14, Debian 13, Debian 12 5.10.12-1

debian advisories DEBIAN-CVE-2023-1390

linux Ubuntu 18.04 LTS 4.15.0-137.141
linux Ubuntu 20.04 LTS 5.4.0-67.75
linux-aws Ubuntu 18.04 LTS 4.15.0-1095.102
linux-aws Ubuntu 20.04 LTS 5.4.0-1039.41
linux-gcp Ubuntu 16.04 LTS 4.15.0-1094.107~16.04.1
linux-gcp Ubuntu 20.04 LTS 5.4.0-1038.41
linux-gke Ubuntu 20.04 LTS 5.4.0-1037.39
linux-hwe Ubuntu 16.04 LTS 4.15.0-137.141~16.04.1

ubuntu advisories UBUNTU-CVE-2023-1390

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 4.18.0-305.el8
perf RHEL 8 4.18.0-305.el8
bpftool RHEL 8 4.18.0-305.el8
kernel-core RHEL 8 4.18.0-305.el8
kernel-tools RHEL 8 4.18.0-305.el8
python3-perf RHEL 8 4.18.0-305.el8
kernel-modules RHEL 8 4.18.0-305.el8
kernel-zfcpdump RHEL 8 4.18.0-305.el8

red hat advisories RHSA-2021:1578 RHSA-2021:1739 RHSA-2023:4146 RHSA-2023:4126 RHSA-2023:4125 RHSA-2023:3191

kernel-syms SLES 12 SP2-BCL 4.4.121-92.205.1
kernel-source SLES 12 SP2-BCL 4.4.121-92.205.1
kernel-default SLES 12 SP2-BCL 4.4.121-92.205.1
kernel-syms SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS +1 more 5.3.18-150200.24.148.1
kernel-source SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS +1 more 5.3.18-150200.24.148.1
kernel-default SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE Live Patching 15 SP2 +3 more 5.3.18-150200.24.148.1
kernel-preempt SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS +1 more 5.3.18-150200.24.148.1
kernel-obs-build SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS +1 more 5.3.18-150200.24.148.1

suse advisories SUSE-SU-2023:2805-1 SUSE-SU-2023:1800-1 SUSE-SU-2023:1811-1 SUSE-SU-2023:1892-1 SUSE-SU-2023:1848-1 SUSE-SU-2023:2232-1

github.com/torvalds/linux@b774134 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-2023-1390 updated 2026-11-04 cvss 7.5

kernel: remote DoS in TIPC kernel module

Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-305.el8, kernel-debuginfo-common-aarch64 4.18.0-305.el8, kernel-debuginfo-common-ppc64le 4.18.0-305.el8 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-305.el8, kernel 4.18.0-305.el8, bpftool 4.18.0-305.el8, kernel-core 4.18.0-305.el8, kernel-tools 4.18.0-305.el8, python3-perf 4.18.0-305.el8, +15 more
fixed: vendor fix RHSA-2021:1578
Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.109.1.el8_2, kernel 4.18.0-193.109.1.el8_2, bpftool 4.18.0-193.109.1.el8_2, kernel-core 4.18.0-193.109.1.el8_2, kernel-tools 4.18.0-193.109.1.el8_2, python3-perf 4.18.0-193.109.1.el8_2, +8 more
fixed: vendor fix RHSA-2023:4125
Red Hat Enterprise Linux BaseOS E4S (v. 8.1) perf 4.18.0-147.83.1.el8_1, kernel 4.18.0-147.83.1.el8_1, bpftool 4.18.0-147.83.1.el8_1, kernel-core 4.18.0-147.83.1.el8_1, kernel-tools 4.18.0-147.83.1.el8_1, python3-perf 4.18.0-147.83.1.el8_1, +14 more
fixed: vendor fix RHSA-2023:3190
Red Hat Enterprise Linux BaseOS E4S (v. 8.2) perf 4.18.0-193.109.1.el8_2, kernel 4.18.0-193.109.1.el8_2, bpftool 4.18.0-193.109.1.el8_2, kernel-core 4.18.0-193.109.1.el8_2, kernel-tools 4.18.0-193.109.1.el8_2, python3-perf 4.18.0-193.109.1.el8_2, +13 more Red Hat Enterprise Linux BaseOS TUS (v. 8.2) perf 4.18.0-193.109.1.el8_2, kernel 4.18.0-193.109.1.el8_2, bpftool 4.18.0-193.109.1.el8_2, kernel-core 4.18.0-193.109.1.el8_2, kernel-tools 4.18.0-193.109.1.el8_2, python3-perf 4.18.0-193.109.1.el8_2, +8 more
fixed: vendor fix RHSA-2023:4125
Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-305.rt7.72.el8, kernel-rt-core 4.18.0-305.rt7.72.el8, kernel-rt-modules 4.18.0-305.rt7.72.el8, kernel-rt-debug-core 4.18.0-305.rt7.72.el8, kernel-rt-debug-modules 4.18.0-305.rt7.72.el8, kernel-rt-modules-extra 4.18.0-305.rt7.72.el8, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-305.rt7.72.el8, kernel-rt-kvm 4.18.0-305.rt7.72.el8, kernel-rt-core 4.18.0-305.rt7.72.el8, kernel-rt-modules 4.18.0-305.rt7.72.el8, kernel-rt-debug-kvm 4.18.0-305.rt7.72.el8, kernel-rt-debug-core 4.18.0-305.rt7.72.el8, +4 more
fixed: vendor fix RHSA-2021:1739
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-kvm 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-core 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-modules 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-debug-kvm 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-debug-core 4.18.0-193.109.1.rt13.160.el8_2, +4 more Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-core 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-modules 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-debug-core 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-debug-modules 4.18.0-193.109.1.rt13.160.el8_2, kernel-rt-modules-extra 4.18.0-193.109.1.rt13.160.el8_2, +2 more
fixed: vendor fix RHSA-2023:4126
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 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Virtualization 4 redhat-virtualization-host-image-update
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 SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 18 mo ago (2025-04-23)

Exploit prediction

5.10% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

n/a Linux kernel (TIPC kernel module)

Classification

Weakness

CWE-1050 Excessive Platform Resource Consumption within a Loop

Technology feeds

Linux kernel rss critical rss

References

github.com /torvalds/linux/commit/b77413446408fdd256599daf00d5be72b5f3e7c6
patch, vendor-advisory
gist.github.com /netspooky/bee2d07022f6350bb88eaa48e571d9b5
third-party-advisory
infosec.exchange /%40_mattata/109427999461122360
security.netapp.com /advisory/ntap-20230420-0001/
third-party-advisory

Sources

CVE List CVE-2023-1390
NVD CVE-2023-1390

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