CVE-2023-4459

Kernel: vmxnet3: null pointer dereference in vmxnet3_rq_cleanup()

MEDIUM
5.5
CVSS Score
Published: August 21, 2023 at 06:49 PM UTC
Updated: October 8, 2026 at 09:17 PM UTC
2 products affected across 2 vendorsLinux KernelEnterprise Linux

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A NULL pointer dereference flaw was found in vmxnet3_rq_cleanup in drivers/net/vmxnet3/vmxnet3_drv.c in the networking sub-component in vmxnet3 in the Linux Kernel. This issue may allow a local attacker with normal user privilege to cause a denial of service due to a missing sanity check during cleanup.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.18*
Affected range stops below 5.18, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 0:4.18.0-193.133.1.el8_2 (unaffected)
Vendor states this is fixed in 0:4.18.0-193.133.1.rt13.184.el8_2 (unaffected)
Vendor states this is fixed in 0:4.18.0-305.125.1.el8_4 (unaffected)
Vendor states this is fixed in 0:4.18.0-305.125.1.rt7.201.el8_4 (unaffected)
Vendor states this is fixed in 0:4.18.0-372.87.1.el8_6 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.93.1.rt21.165.el9_0 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.93.2.el9_0 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)

References (10)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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