CVE-2023-2166: linux linux_kernel NULL Pointer Dereference

Modified

AliasesUBUNTU-CVE-2023-2166DEBIAN-CVE-2023-2166

Published 19-04-2023Last modified 05-02-2025

Vulnerability summary

CVE-2023-2166 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.8% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.20%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

19-04-2023
PublishedVulnerability first disclosed.
05-02-2025
Last modifiedVulnerability information updated.

Description

A null pointer dereference issue was found in can protocol in net/can/af_can.c in the Linux before Linux. ml_priv may not be initialized in the receive path of CAN frames. A local user could use this flaw to crash the system or potentially cause a denial of service.

CVSS metrics

4 scores · 4 sources · 1 version

v3.15.5

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-476NULL Pointer DereferenceThe product dereferences a pointer that it expects to be valid but is NULL.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu85 products

linux< 5.4.0-144.161 | < 5.15.0-67.74
linux-aws< 5.4.0-1097.105 | < 5.15.0-1031.35
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)
linux-aws-5.13All versions (No fix recorded)

linux-aws-5.15< 5.15.0-1031.35~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1097.105~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 5.4.0-1099.107+fips1
linux-azureAll versions (No fix recorded) | < 5.4.0-1104.110 | < 5.15.0-1034.41
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1034.41~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1104.110~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1034.41.1
linux-azure-fde-5.15< 5.15.0-1034.41~20.04.1.2
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fips< 5.4.0-1104.110+fips1
linux-bluefield< 5.4.0-1059.65 | < 5.15.0-1014.16
linux-fips< 5.4.0-1073.82
linux-gcpAll versions (No fix recorded) | < 5.4.0-1101.110 | < 5.15.0-1030.37
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1030.37~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1101.110~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 5.4.0-1101.110+fips1
linux-gke< 5.4.0-1095.102 | < 5.15.0-1028.33
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1028.33~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1065.69 | < 5.15.0-1016.21
linux-gkeop-5.15< 5.15.0-1016.21~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hweAll versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-67.74~20.04.1
linux-hwe-5.19< 5.19.0-38.39~22.04.1
linux-hwe-5.4< 5.4.0-144.161~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1045.50 | < 5.15.0-1026.29
linux-ibm-5.4< 5.4.0-1045.50~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1022.27
linux-intel-iotg< 5.15.0-1026.31
linux-intel-iotg-5.15< 5.15.0-1026.31~20.04.1
linux-iot< 5.4.0-1013.15
linux-kvm< 5.4.0-1087.93 | < 5.15.0-1029.34
linux-lowlatency< 5.15.0-67.74
linux-lowlatency-hwe-5.15< 5.15.0-67.74~20.04.1
linux-lowlatency-hwe-5.19< 5.19.0-1021.22~22.04.1
linux-nvidia< 5.15.0-1023.23
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oracle< 5.4.0-1094.103 | < 5.15.0-1030.36
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1030.36~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1094.103~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1081.92 | < 5.15.0-1025.27
linux-raspi-5.4< 5.4.0-1081.92~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1033.36
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1030.34~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-xilinx-zynqmp< 5.4.0-1022.26

Show all 85

Debian1 product

linux< 6.1.4-1

Linux1 product

linux_kernel< 6.1 | 6.1 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5 | 6.1:rc6 | 6.1:rc7 | 6.1:rc8

3 vendors · 87 products

References

7 links