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  4. CVE 2023 4387 kernel vmxnet3 use after free in
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Back to active CVEs
High · CVSS 7.1CVE-2023-4387

Kernel: vmxnet3: use-after-free in vmxnet3_rq_alloc_rx_buf()CVE-2023-4387

Answer in brief

CVE-2023-4387 records a High severity (CVSS 7.1) vulnerability in Kernel: vmxnet3: use-after-free in vmxnet3_rq_alloc_rx_buf(). The current sources do not mark it as known exploited. The current feed maps Red Hat/kernel-rt (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 16, 2023Updated Nov 7, 2026Source checked Nov 7, 2026First seen by HOL Nov 7, 2026Material review Nov 7, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/kernel-rt (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/kernel-rtgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/kernel-rt.
  2. 2Review the reported fix. Source-reported workaround: Mitigation for this issue is to skip loading the affected module "vmxnet3" onto the system until the fix is available, this can be done by a blacklist mechanism which will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~

Evidence timeline and material changes

  1. Published upstream

    Aug 16, 2023

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 7, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 7, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Fraunhofer HHI VVdeC before 3.2.1 Heap Use-After-Free via ALF APS RedefinitionAlso CWE-416
  • Fraunhofer HHI VVdeC before 3.2.1 Use-After-Free via DecLibRecon::createSubPicRefBufsAlso CWE-416

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 7, 2026
References
5 linked sources
Open source record