CVE-2023-46343: linux linux_kernel NULL Pointer Dereference

Modified

AliasesUBUNTU-CVE-2023-46343DEBIAN-CVE-2023-46343

Published 23-01-2024Last modified 17-06-2025

Vulnerability summary

CVE-2023-46343 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.8% 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

0.24%

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

23-01-2024
PublishedVulnerability first disclosed.
17-06-2025
Last modifiedVulnerability information updated.

Description

In the Linux kernel before 6.5.9, there is a NULL pointer dereference in send_acknowledge in net/nfc/nci/spi.c.

CVSS metrics

4 scores · 4 sources · 1 version

v3.15.5

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% 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.

Ubuntu116 products

linuxAll versions (No fix recorded) | < 4.4.0-257.291 | < 4.15.0-227.239 | < 5.4.0-171.189 | < 5.15.0-100.110
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1170.183 | < 5.4.0-1118.128 | < 5.15.0-1056.61
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< 5.15.0-1056.61~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1118.128~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-6.5< 6.5.0-1015.15~22.04.1
linux-aws-fips< 4.15.0-2109.115 | All versions (No fix recorded) | < 5.4.0-1118.128+fips1 | < 5.15.0-1056.61+fips1
linux-aws-hwe< 4.15.0-1170.183~16.04.1
linux-azure< 4.15.0-1179.194~14.04.1 | < 4.15.0-1179.194~16.04.1 | All versions (No fix recorded) | < 5.4.0-1123.130 | < 5.15.0-1058.66
linux-azure-4.15< 4.15.0-1179.194
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1058.66~20.04.2
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1123.130~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-6.5< 6.5.0-1016.16~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1058.66.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 4.15.0-2088.94 | All versions (No fix recorded) | < 5.4.0-1123.130+fips1
linux-bluefield< 5.4.0-1078.84 | < 5.15.0-1037.39
linux-fips< 4.4.0-1103.110 | All versions (No fix recorded) | < 4.15.0-1125.136 | < 5.4.0-1092.102 | < 5.15.0-100.110+fips1
linux-gcp< 4.15.0-1164.181~16.04.1 | All versions (No fix recorded) | < 5.4.0-1122.131 | < 5.15.0-1053.61
linux-gcp-4.15< 4.15.0-1164.181
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1053.61~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1122.131~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-6.5< 6.5.0-1015.15~22.04.1
linux-gcp-fips< 4.15.0-2072.77 | All versions (No fix recorded) | < 5.4.0-1122.131+fips1 | < 5.15.0-1055.63+fips2
linux-gkeAll versions (No fix recorded) | < 5.15.0-1052.57
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1085.89 | < 5.15.0-1038.44
linux-gkeop-5.15< 5.15.0-1038.44~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-227.239~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-100.110~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-171.189~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-6.5< 6.5.0-25.25~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1065.70 | < 5.15.0-1048.51
linux-ibm-5.15< 5.15.0-1048.51~20.04.1
linux-ibm-5.4< 5.4.0-1065.70~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1048.50
linux-intel-iotg< 5.15.0-1050.56
linux-intel-iotg-5.15< 5.15.0-1050.56~20.04.1
linux-iot< 5.4.0-1030.31
linux-kvm< 4.4.0-1135.145 | < 4.15.0-1154.159 | < 5.4.0-1106.113 | < 5.15.0-1052.57
linux-lowlatency< 5.15.0-100.110
linux-lowlatency-hwe-5.15< 5.15.0-100.110~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5< 6.5.0-25.25.1~22.04.1
linux-lts-xenial< 4.4.0-257.291~14.04.1
linux-nvidia< 5.15.0-1046.46
linux-nvidia-6.2All versions (No fix recorded)
linux-nvidia-6.5< 6.5.0-1014.14
linux-nvidia-tegra< 5.15.0-1025.25
linux-nvidia-tegra-5.15< 5.15.0-1025.25~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1012.12
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-oem-6.1All versions (No fix recorded)
linux-oem-6.5< 6.5.0-1016.17
linux-oracle< 4.15.0-1133.144~16.04.1 | < 4.15.0-1133.144 | < 5.4.0-1117.126 | < 5.15.0-1053.59
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< 5.15.0-1053.59~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1117.126~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.5All versions (No fix recorded)
linux-raspi< 5.4.0-1102.114 | < 5.15.0-1048.51 | < 6.7.0-1001.1
linux-raspi-5.4< 5.4.0-1102.114~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1056.63
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1051.55~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-riscv-6.5< 6.5.0-25.25.1~22.04.1
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-starfive-6.5< 6.5.0-1009.10~22.04.1
linux-xilinx-zynqmp< 5.4.0-1037.41 | < 5.15.0-1030.34

Show all 116

Debian1 product

linux< 6.1.64-1 | < 6.5.10-1

Linux1 product

linux_kernel< 6.5.9

3 vendors · 118 products

References

24 links

lore.kernel.org/netdev/20231013184129.18738-1-krzysztof.kozlowski%40linaro.org/T/REPORTPatch
cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9REPORTPatch
github.com/torvalds/linux/commit/7937609cd387246aed994e81aa4fa951358fba41REPORTPatch
git.kernel.org/cgit/…REPORTPatch
ubuntu.com/security/CVE-2023-46343REPORT
ubuntu.com/security/notices/USN-6625-1Advisory
ubuntu.com/security/notices/USN-6625-2Advisory
ubuntu.com/security/notices/USN-6625-3Advisory
ubuntu.com/security/notices/USN-6680-1Advisory
ubuntu.com/security/notices/USN-6686-1Advisory

Show all 24 references

ubuntu.com/security/notices/USN-6680-2Advisory
ubuntu.com/security/notices/USN-6686-2Advisory
ubuntu.com/security/notices/USN-6680-3Advisory
ubuntu.com/security/notices/USN-6686-3Advisory
ubuntu.com/security/notices/USN-6686-4Advisory
ubuntu.com/security/notices/USN-6705-1Advisory
ubuntu.com/security/notices/USN-6686-5Advisory
www.cve.org/CVERecord?id=CVE-2023-46343REPORT
ubuntu.com/security/notices/USN-6926-1Advisory
ubuntu.com/security/notices/USN-6938-1Advisory
ubuntu.com/security/notices/USN-6926-2Advisory
ubuntu.com/security/notices/USN-6926-3Advisory
security-tracker.debian.org/tracker/CVE-2023-46343Advisory
nvd.nist.gov/vuln/detail/CVE-2023-46343OvalAdvisory