CVE-2023-45871

System crash via undersized RX-ALL receive buffer

Published Oct 15, 2023 · Updated Aug 2, 2024

Buffer overflow in the Linux kernel IGB driver before 6.5.3 allows attackers to crash the system via oversized Ethernet frames. The igb_set_rx_buffer_len routine chooses a large RX buffer from max_frame_size alone and ignores E1000_RCTL_SBP, leaving RX-ALL frames larger than the MTU in an undersized buffer. Exploitation requires adjacent physical-layer access and RX-ALL enabled; a successful overflow crashes the kernel.

CVSS severity7.5
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the Linux kernel IGB driver before 6.5.3 allows attackers to crash the system via oversized Ethernet frames. The igb_set_rx_buffer_len routine chooses a large RX buffer from max_frame_size alone and ignores E1000_RCTL_SBP, leaving RX-ALL frames larger than the MTU in an undersized buffer. Exploitation requires adjacent physical-layer access and RX-ALL enabled; a successful overflow crashes the kernel.

The record

CVE
CVE-2023-45871
Published
Oct 15, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-131, T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-131Incorrect Calculation of Buffer Size
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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