CVE-2024-42083

Kernel panic via reused scatter-gather pages

Published Jul 29, 2024 · Updated Aug 5, 2026

Improper multi-buffer handling in Linux 6.9 through 6.9.7 allows remote attackers to trigger a kernel panic with jumbo frames. The ionic_run_xdp() path unmaps and clears only the first receive page for XDP_TX or XDP_REDIRECT, leaving scatter-gather pages DMA-mapped and eligible for reuse. The host must use an ionic adapter, jumbo MTU, and an XDP fragments program returning one of those actions; the triggering frames must arrive from the same Layer 2 segment.

CVSS severity5.5
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper multi-buffer handling in Linux 6.9 through 6.9.7 allows remote attackers to trigger a kernel panic with jumbo frames. The ionic_run_xdp() path unmaps and clears only the first receive page for XDP_TX or XDP_REDIRECT, leaving scatter-gather pages DMA-mapped and eligible for reuse. The host must use an ionic adapter, jumbo MTU, and an XDP fragments program returning one of those actions; the triggering frames must arrive from the same Layer 2 segment.

The record

CVE
CVE-2024-42083
Published
Jul 29, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 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=5377805dc1c02ad3721a9256f0eef9b4813952e7 <8ae401525ae84228a8986bb369224a6224e4d22f
  2. Affected versionversion=5377805dc1c02ad3721a9256f0eef9b4813952e7 <e3f02f32a05009a688a87f5799e049ed6b55bab5
  3. Affected versionversion=6.9

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5377805dc1c02ad3721a9256f0eef9b4813952e7 <8ae401525ae84228a8986bb369224a6224e4d22f; version=5377805dc1c02ad3721a9256f0eef9b4813952e7 <e3f02f32a05009a688a87f5799e049ed6b55bab5; version=6.9

Published CVSS scores

7.3SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8SUSECVSS:3.1/AV:L/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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