CVE-2024-42281

System crash via unlinearized fragmented GSO packets

Published Aug 17, 2024 · Updated May 12, 2026

Denial of service in the Linux kernel allows local users to crash the system through fragmented GSO packet segmentation. In net/core/filter.c, bpf_skb_net_grow decreases gso_size after header growth but fails to linearize an skb with a frag_list and head_frag set, so later segmentation reaches a BUG_ON. Triggering the crash requires local access capable of running the relevant BPF packet path and supplying a fragmented GSO skb; no confidentiality impact is reported.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to crash the system through fragmented GSO packet segmentation. In net/core/filter.c, bpf_skb_net_grow decreases gso_size after header growth but fails to linearize an skb with a frag_list and head_frag set, so later segmentation reaches a BUG_ON. Triggering the crash requires local access capable of running the relevant BPF packet path and supplying a fragmented GSO skb; no confidentiality impact is reported.

The record

CVE
CVE-2024-42281
Published
Aug 17, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-20, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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?

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  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=2be7e212d5419a400d051c84ca9fdd083e5aacac <11ec79f5c7f74261874744039bc1551023edd6b2; version=2be7e212d5419a400d051c84ca9fdd083e5aacac <a689f5eb13a90f892a088865478b3cd39f53d5dc; version=2be7e212d5419a400d051c84ca9fdd083e5aacac <c3496314c53e7e82ddb544c825defc3e8c0e45cf; version=2be7e212d5419a400d051c84ca9fdd083e5aacac <dda518dea60d556a2d171c0122ca7d9fdb7d473a; version=2be7e212d5419a400d051c84ca9fdd083e5aacac <ec4eea14d75f7b0491194dd413f540dd19b8c733; version=2be7e212d5419a400d051c84ca9fdd083e5aacac <f6bb8c90cab97a3e03f8d30e3069efe6a742e0be; version=2be7e212d5419a400d051c84ca9fdd083e5aacac <fa5ef655615a01533035c6139248c5b33aa27028; version=4.13

Published CVSS scores

5.1Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
5.5NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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