CVE-2024-46865Network attack vector

Kernel crash via uninitialized GUE GRO state

Published Sep 27, 2024 · Updated Aug 5, 2026

Use of uninitialized kernel state in Linux's GUE GRO receive path allows remote attackers to crash the kernel with crafted UDP traffic. When fou is NULL, gue_gro_receive takes its exit path before skb_gro_remcsum_init initializes grc, leaving cleanup to consume indeterminate state. Reachability requires a configured GUE/FOU receive path; the stale offset can cause an out-of-bounds kernel write, memory disclosure, or a kernel crash.

CVSS severity9.8
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of uninitialized kernel state in Linux's GUE GRO receive path allows remote attackers to crash the kernel with crafted UDP traffic. When fou is NULL, gue_gro_receive takes its exit path before skb_gro_remcsum_init initializes grc, leaving cleanup to consume indeterminate state. Reachability requires a configured GUE/FOU receive path; the stale offset can cause an out-of-bounds kernel write, memory disclosure, or a kernel crash.

The record

CVE
CVE-2024-46865
Published
Sep 27, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-908, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 27, 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=0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=1df42be305fe478ded1ee0c1d775f4ece713483b <7ae890ee19479eeeb87724cca8430b5cb3660c74; version=231c235d2f7a66f018f172e26ffd47c363f244ef <392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e; version=4494bccb52ffda22ce5a1163a776d970e6229e08 <16ff0895283058b0f96d4fe277aa25ee096f0ea8; version=5.10.226 <5.10.227; version=5.15.167 <5.15.168; version=6.10.10 <6.10.11; version=6.1.110 <6.1.111; version=6.6.51 <6.6.52; version=7e4196935069947d8b70b09c1660b67b067e75cb <4c8002277167125078e6b9b90137bdf443ebaa08; version=c46cd6aaca81040deaea3500ba75126963294bd9 <aca06c617c83295f0caa486ad608fbef7bdc11e8; version=d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3 <5d537b8d900514509622ce92330b70d2e581d409

Published CVSS scores

7.1Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
9.8Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
T1499Endpoint Denial of Service

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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