CVE-2023-4387: linux linux_kernel Use After Free

CVSS: 7.1v3.1HighModified

AliasesUBUNTU-CVE-2023-4387DEBIAN-CVE-2023-4387

Published 16-08-2023Last modified 06-11-2025

Vulnerability summary

CVE-2023-4387 is a high (CVSS 7.1) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.5% of scored vulnerabilities.

Overall risk

28/100

0100

Medium · default modelHow is this calculated?

CVSS score

7.1/10

010

High · v3.1 (CVE.org)

EPSS score

0.24%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits0No public exploits recorded

Timeline

16-08-2023
PublishedVulnerability first disclosed.
06-11-2025
Last modifiedVulnerability information updated.

Description

A use-after-free flaw was found in vmxnet3_rq_alloc_rx_buf in drivers/net/vmxnet3/vmxnet3_drv.c in VMware's vmxnet3 ethernet NIC driver in the Linux Kernel. This issue could allow a local attacker to crash the system due to a double-free while cleaning up vmxnet3_rq_cleanup_all, which could also lead to a kernel information leak problem.

CVSS metrics

4 scores · 4 sources · 1 version

v3.17.1

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 21-09-2026

21-09-202621-10-2026

EPSS score

0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

Ubuntu86 products

linux< 4.4.0-245.279 | < 4.15.0-191.202 | < 5.4.0-126.142 | < 5.15.0-47.51
linux-aws< 4.4.0-1123.129 | < 4.4.0-1161.176 | < 4.15.0-1139.150 | < 5.4.0-1085.92 | < 5.15.0-1019.23
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< 5.15.0-1019.23~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1085.92~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2078.83 | All versions (No fix recorded) | < 5.4.0-1085.92+fips1
linux-aws-hwe< 4.15.0-1139.150~16.04.1
linux-azure< 4.15.0-1149.164~14.04.1 | < 4.15.0-1149.164~16.04.1 | All versions (No fix recorded) | < 5.4.0-1091.96 | < 5.15.0-1019.24
linux-azure-4.15< 4.15.0-1149.164
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1019.24~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1091.96~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fips< 4.15.0-2059.65 | All versions (No fix recorded) | < 5.4.0-1091.96+fips1
linux-bluefield< 5.4.0-1046.51
linux-fips< 4.4.0-1093.100 | All versions (No fix recorded) | < 4.15.0-1096.107 | < 5.4.0-1061.69
linux-gcp< 4.15.0-1134.150~16.04.2 | All versions (No fix recorded) | < 5.4.0-1089.97 | < 5.15.0-1017.23
linux-gcp-4.15< 4.15.0-1134.150
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1017.23~20.04.2
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1089.97~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2043.48 | All versions (No fix recorded) | < 5.4.0-1089.97+fips1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1015.18
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< 5.4.0-1053.56 | < 5.15.0-1002.4
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-191.202~16.04.1 | 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< 5.15.0-48.54~20.04.1
linux-hwe-5.4< 5.4.0-126.142~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1033.37 | < 5.15.0-1013.15
linux-ibm-5.4< 5.4.0-1033.37~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-intel-iotg< 5.15.0-1015.20
linux-intel-iotg-5.15< 5.15.0-1015.20~20.04.2
linux-iot< 5.4.0-1004.6
linux-kvm< 4.4.0-1124.134 | < 4.15.0-1125.130 | < 5.4.0-1075.80 | < 5.15.0-1017.21
linux-lowlatency< 5.15.0-47.53
linux-lowlatency-hwe-5.15< 5.15.0-48.54~20.04.1
linux-lts-xenial< 4.4.0-245.279~14.04.1
linux-nvidia< 5.15.0-1007.7
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-5.17< 5.17.0-1013.14
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1104.115~16.04.1 | < 4.15.0-1104.115 | < 5.4.0-1083.91 | < 5.15.0-1017.22
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< 5.15.0-1017.22~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1083.91~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1070.80 | < 5.15.0-1014.16
linux-raspi-5.4< 5.4.0-1070.80~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1020.20
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1018.21~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)

Show all 86

Debian1 product

linux< 5.17.11-1

Linux1 product

linux_kernel≥ 3.16.60, < 3.17 | ≥ 4.4, < 4.9.316 | ≥ 4.10, < 4.14.281 | ≥ 4.15, < 4.19.245 | ≥ 4.20, < 5.4.196 | ≥ 5.5, < 5.10.118 | ≥ 5.11, < 5.15.42 | ≥ 5.16, < 5.17.10

Redhat1 product

enterprise_linuxEOL6.0 | 7.0 | 8.0 | 9.0

4 vendors · 89 products

References

11 links

access.redhat.com/errata/RHSA-2022:7683Vendor AdvisoryX Refsource REDHAT
access.redhat.com/errata/RHSA-2022:8267Vendor AdvisoryX Refsource REDHAT
access.redhat.com/security/cve/CVE-2023-4387VDB EntryX Refsource REDHATREPORTThird Party Advisory
bugzilla.redhat.com/show_bug.cgi?id=2219270Issue TrackingX Refsource REDHATThird Party Advisory
github.com/torvalds/linux/commit/9e7fef9521e73ca8afd7da9e58c14654b02dfad8REPORTPatch
ubuntu.com/security/CVE-2023-4387REPORT
git.kernel.org/linus/9e7fef9521e73ca8afd7da9e58c14654b02dfad8REPORT
ubuntu.com/security/notices/USN-6388-1Advisory
www.cve.org/CVERecord?id=CVE-2023-4387REPORT
security-tracker.debian.org/tracker/CVE-2023-4387Advisory

Show all 11 references

nvd.nist.gov/vuln/detail/CVE-2023-4387OvalAdvisory

Vulnerability summary

Advisory lineage

Timeline

Description

CVSS metrics

EPSS trend

Known exploited

Public exploits

Weaknesses

Affected systems

References

Related vulnerabilities