CVE-2023-47233: linux linux_kernel Use After Free

Modified

AliasesUBUNTU-CVE-2023-47233DEBIAN-CVE-2023-47233

Published 03-11-2023Last modified 15-10-2026

Vulnerability summary

CVE-2023-47233 is a medium (CVSS 4.3) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 24.5% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 4.3, physical access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

4.3/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.32%

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

Advisory lineage

Upstream 0 · Downstream 50 · Related 44

Timeline

03-11-2023
PublishedVulnerability first disclosed.
15-10-2026
Last modifiedVulnerability information updated.

Description

The brcm80211 component in the Linux kernel through 6.5.10 has a brcmf_cfg80211_detach use-after-free in the device unplugging (disconnect the USB by hotplug) code. For physically proximate attackers with local access, this "could be exploited in a real world scenario." This is related to brcmf_cfg80211_escan_timeout_worker in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c.

CVSS metrics

4 scores · 4 sources · 1 version

v3.14.3

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.32% 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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: physical access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu117 products

linuxAll versions (No fix recorded) | < 4.4.0-254.288 | < 4.15.0-225.237 | < 5.4.0-182.202 | < 5.15.0-107.117 | < 6.8.0-35.35
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.4.0-1131.137 | < 4.4.0-1169.184 | < 4.15.0-1168.181 | < 5.4.0-1125.135 | < 5.15.0-1062.68 | < 6.8.0-1009.9
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< 5.15.0-1062.68~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1125.135~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2All versions (No fix recorded)
linux-aws-6.5< 6.5.0-1020.20~22.04.1
linux-aws-fips< 4.15.0-2107.113 | All versions (No fix recorded) | < 5.4.0-1125.135+fips1 | < 5.15.0-1062.68+fips1
linux-aws-hwe< 4.15.0-1168.181~16.04.1
linux-azure< 4.15.0-1177.192~14.04.1 | < 4.15.0-1177.192~16.04.1 | All versions (No fix recorded) | < 5.4.0-1130.137 | < 5.15.0-1064.73 | < 6.8.0-1008.8
linux-azure-4.15< 4.15.0-1177.192
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1064.73~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1130.137~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2All versions (No fix recorded)
linux-azure-6.5< 6.5.0-1021.22~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1064.73.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2All versions (No fix recorded)
linux-azure-fips< 4.15.0-2086.92 | All versions (No fix recorded) | < 5.4.0-1130.137+fips1 | < 5.15.0-1064.73+fips1
linux-bluefield< 5.4.0-1085.92 | < 5.15.0-1043.45
linux-fips< 4.4.0-1101.108 | All versions (No fix recorded) | < 4.15.0-1123.134 | < 5.4.0-1099.109 | < 5.15.0-107.117+fips1
linux-gcp< 4.15.0-1162.179~16.04.1 | All versions (No fix recorded) | < 5.4.0-1129.138 | < 5.15.0-1060.68 | < 6.8.0-1008.9
linux-gcp-4.15< 4.15.0-1162.179
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1060.68~20.04.1
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1129.138~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2All versions (No fix recorded)
linux-gcp-6.5< 6.5.0-1020.20~22.04.1
linux-gcp-fips< 4.15.0-2070.75 | All versions (No fix recorded) | < 5.4.0-1129.138+fips1 | < 5.15.0-1060.68+fips1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1059.64 | < 6.8.0-1004.7
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< 5.4.0-1092.96 | < 5.15.0-1045.52
linux-gkeop-5.15< 5.15.0-1045.52~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-225.237~16.04.1 | 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< 5.15.0-107.117~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-182.202~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2All versions (No fix recorded)
linux-hwe-6.5< 6.5.0-35.35~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1072.77 | < 5.15.0-1055.58 | < 6.8.0-1006.6
linux-ibm-5.15< 5.15.0-1055.58~20.04.1
linux-ibm-5.4< 5.4.0-1072.77~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1055.57
linux-intel-iotg< 5.15.0-1057.63
linux-intel-iotg-5.15< 5.15.0-1058.64~20.04.1
linux-iot< 5.4.0-1037.38
linux-kvm< 4.4.0-1132.142 | < 4.15.0-1152.157 | < 5.4.0-1113.120 | < 5.15.0-1059.64
linux-lowlatency< 5.15.0-107.117 | < 6.8.0-35.35.1
linux-lowlatency-hwe-5.15< 5.15.0-107.117~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2All versions (No fix recorded)
linux-lowlatency-hwe-6.5< 6.5.0-35.35.1~22.04.1
linux-lts-xenial< 4.4.0-254.288~14.04.1
linux-nvidia< 5.15.0-1055.56
linux-nvidia-6.2All versions (No fix recorded)
linux-nvidia-6.5< 6.5.0-1019.19
linux-nvidia-tegra< 5.15.0-1026.26
linux-nvidia-tegra-5.15< 5.15.0-1027.27~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1015.15
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< 6.5.0-1023.24
linux-oem-6.8< 6.8.0-1006.6
linux-oracle< 4.15.0-1131.142~16.04.1 | < 4.15.0-1131.142 | < 5.4.0-1124.133 | < 5.15.0-1060.66 | < 6.8.0-1006.6
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< 5.15.0-1061.67~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1124.133~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-oracle-6.5< 6.5.0-1023.23~22.04.1
linux-raspi< 5.4.0-1109.121 | < 5.15.0-1055.58 | < 6.8.0-1005.5
linux-raspi-5.4< 5.4.0-1109.121~18.04.1
linux-raspi-realtime< 6.8.0-2004.4
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1063.71 | < 6.8.1-1002.2
linux-riscvAll versions (No fix recorded) | < 6.8.0-35.35.1
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1058.62~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-riscv-6.5< 6.5.0-35.35.1~22.04.1
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2All versions (No fix recorded)
linux-starfive-6.5< 6.5.0-1014.15~22.04.1
linux-xilinx-zynqmp< 5.4.0-1044.48 | < 5.15.0-1030.34