Kernel memory disclosure via uninitialized Ethernet padding
Published Oct 21, 2024 · Updated May 12, 2026
Information disclosure in the Linux lantiq_etop driver allows physically proximate attackers to read kernel memory from Ethernet padding. The transmit path pads short frames without zeroing the expanded socket-buffer bytes, placing residual kernel data on the wire. Exposure requires the lantiq_etop driver on Amazon-SE or Danube hardware and visibility into transmitted short Ethernet frames.
Summary
What happened
Information disclosure in the Linux lantiq_etop driver allows physically proximate attackers to read kernel memory from Ethernet padding. The transmit path pads short frames without zeroing the expanded socket-buffer bytes, placing residual kernel data on the wire. Exposure requires the lantiq_etop driver on Amazon-SE or Danube hardware and visibility into transmitted short Ethernet frames.
The record
- CVE
- CVE-2024-49997
- Published
- Oct 21, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
- Classifications
- CWE-226, T1040
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 21, 2024CVE publishedPublication date reported by the CVE source.
- 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=V3.1.0 <V3.1.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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