CVE-2024-40937

Local system crash via dangling receive-buffer pointer

Published Jul 12, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel gve receive path allows local users to crash an affected system during packet-buffer processing. The gve_rx_free_skb function frees an skb without clearing napi->skb, so a later napi_get_frags call can return the dangling pointer. The affected path requires the gve driver and low-privileged local access; the grounded impact is a system crash without data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel gve receive path allows local users to crash an affected system during packet-buffer processing. The gve_rx_free_skb function frees an skb without clearing napi->skb, so a later napi_get_frags call can return the dangling pointer. The affected path requires the gve driver and low-privileged local access; the grounded impact is a system crash without data disclosure or modification.

The record

CVE
CVE-2024-40937
Published
Jul 12, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.14
  2. Affected versionversion=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <2ce5341c36993b776012601921d7688693f8c037
  3. Affected versionversion=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <6f4d93b78ade0a4c2cafd587f7b429ce95abb02e
  4. Affected versionversion=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <75afd8724739ee5ed8165acde5f6ac3988b485cc
  5. Affected versionversion=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50
  6. Affected versionversion=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <d221284991118c0ab16480b53baecd857c0bc442

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <2ce5341c36993b776012601921d7688693f8c037; version=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <6f4d93b78ade0a4c2cafd587f7b429ce95abb02e; version=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <75afd8724739ee5ed8165acde5f6ac3988b485cc; version=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <a68184d5b420ea4fc7e6b7ceb52bbc66f90d3c50; version=9b8dd5e5ea48bbb7532d20c4093a79d8283e4029 <d221284991118c0ab16480b53baecd857c0bc442

Published CVSS scores

9.8Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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