CVE-2023-32269: linux linux_kernel Use After Free

Modified

AliasesUBUNTU-CVE-2023-32269DEBIAN-CVE-2023-32269

Published 05-05-2023Last modified 05-05-2025

Vulnerability summary

CVE-2023-32269 is a medium (CVSS 6.7) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.2% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 6.7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

6.7/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.27%

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

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

Description

An issue was discovered in the Linux kernel before 6.1.11. In net/netrom/af_netrom.c, there is a use-after-free because accept is also allowed for a successfully connected AF_NETROM socket. However, in order for an attacker to exploit this, the system must have netrom routing configured or the attacker must have the CAP_NET_ADMIN capability.

CVSS metrics

5 scores · 4 sources · 2 versions

v4.07.3v3.16.7

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.27% 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-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

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

Ubuntu91 products

linuxAll versions (No fix recorded) | < 4.4.0-245.279 | < 4.15.0-211.222 | < 5.4.0-149.166 | < 5.15.0-72.79
linux-allwinner-5.19< 5.19.0-1012.12~22.04.1
linux-aws< 4.4.0-1123.129 | < 4.4.0-1161.176 | < 4.15.0-1156.169 | < 5.4.0-1102.110 | < 5.15.0-1036.40
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< 5.15.0-1036.40~20.04.1
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1103.111~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2095.101 | All versions (No fix recorded) | < 5.4.0-1102.110+fips1
linux-aws-hwe< 4.15.0-1156.169~16.04.1
linux-azure< 4.15.0-1165.180~14.04.1 | < 4.15.0-1165.180~16.04.1 | All versions (No fix recorded) | < 5.4.0-1108.114 | < 5.15.0-1038.45
linux-azure-4.15< 4.15.0-1165.180
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1038.45~20.04.1
linux-azure-5.19< 5.19.0-1026.29~22.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1108.114~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde< 5.15.0-1038.45.1
linux-azure-fips< 4.15.0-2074.80 | All versions (No fix recorded) | < 5.4.0-1108.114+fips1
linux-bluefield< 5.4.0-1064.70 | < 5.15.0-1017.19
linux-fips< 4.4.0-1093.100 | All versions (No fix recorded) | < 4.15.0-1111.122 | < 5.4.0-1077.86
linux-gcp< 4.15.0-1150.166~16.04.1 | All versions (No fix recorded) | < 5.4.0-1105.114 | < 5.15.0-1034.42
linux-gcp-4.15< 4.15.0-1150.166
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1034.42~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1105.114~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2058.63 | All versions (No fix recorded) | < 5.4.0-1105.114+fips1
linux-gke< 5.4.0-1099.106 | < 5.15.0-1033.38
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15< 5.15.0-1033.38~20.04.1
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1069.73 | < 5.15.0-1020.25
linux-gkeop-5.15< 5.15.0-1020.25~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-211.222~16.04.1 | 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< 5.15.0-72.79~20.04.1
linux-hwe-5.19< 5.19.0-42.43~22.04.1
linux-hwe-5.4< 5.4.0-149.166~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1049.54 | < 5.15.0-1030.33
linux-ibm-5.4< 5.4.0-1049.54~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1028.33
linux-intel-iotg< 5.15.0-1030.35
linux-intel-iotg-5.15< 5.15.0-1030.35~20.04.1
linux-iot< 5.4.0-1017.18
linux-kvm< 4.4.0-1124.134 | < 4.15.0-1140.145 | < 5.4.0-1091.97 | < 5.15.0-1033.38
linux-lowlatency< 5.15.0-72.79
linux-lowlatency-hwe-5.15< 5.15.0-72.79~20.04.1
linux-lowlatency-hwe-5.19< 5.19.0-1024.25~22.04.1
linux-lts-xenial< 4.4.0-245.279~14.04.1
linux-nvidia< 5.15.0-1025.25
linux-nvidia-tegra-5.15< 5.15.0-1014.14~20.04.1
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-6.0< 6.0.0-1021.21
linux-oem-6.1< 6.1.0-1008.8
linux-oracle< 4.15.0-1119.130~16.04.1 | < 4.15.0-1119.130 | < 5.4.0-1101.110 | < 5.15.0-1035.41
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< 5.15.0-1035.41~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1101.110~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1085.96 | < 5.15.0-1029.31
linux-raspi-5.4< 5.4.0-1085.96~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1132.140 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1038.41
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1033.37~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1150.160
linux-xilinx-zynqmp< 5.4.0-1024.28