CVE-2025-40252Network attack vector

Kernel memory read via unterminated length list

Published Dec 4, 2025 · Updated Aug 5, 2026

Out-of-bounds read in the Linux qede driver and Siemens RUGGEDCOM RST2428P before 4.0 allows attackers to read adjacent kernel memory. The qede_tpa_cont() and qede_tpa_end() loops trust a zero-length sentinel in cqe->len_list[] and can iterate beyond that fixed-size array. Exploitation requires the qede driver and malformed receive-completion metadata; public advisories do not explain how attackers create that state or expose the read.

CVSS severity9.8
Critical
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in the Linux qede driver and Siemens RUGGEDCOM RST2428P before 4.0 allows attackers to read adjacent kernel memory. The qede_tpa_cont() and qede_tpa_end() loops trust a zero-length sentinel in cqe->len_list[] and can iterate beyond that fixed-size array. Exploitation requires the qede driver and malformed receive-completion metadata; public advisories do not explain how attackers create that state or expose the read.

The record

CVE
CVE-2025-40252
Published
Dec 4, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 2025CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.6
  2. Affected versionversion=55482edc25f0606851de42e73618f813f310d009 <896f1a2493b59beb2b5ccdf990503dbb16cb2256
  3. Affected versionversion=55482edc25f0606851de42e73618f813f310d009 <917a9d02182ac8b4f25eb47dc02f3ec679608c24
  4. Affected versionversion=55482edc25f0606851de42e73618f813f310d009 <a778912b4a53587ea07d85526d152f85d109cbfe
  5. Affected versionversion=55482edc25f0606851de42e73618f813f310d009 <e441db07f208184e0466abf44b389a81d70c340e
  6. Affected versionversion=55482edc25f0606851de42e73618f813f310d009 <ecbb12caf399d7cf364b7553ed5aebeaa2f255bc
  7. Affected versionversion=55482edc25f0606851de42e73618f813f310d009 <f0923011c1261b33a2ac1de349256d39cb750dd0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=55482edc25f0606851de42e73618f813f310d009 <896f1a2493b59beb2b5ccdf990503dbb16cb2256; version=55482edc25f0606851de42e73618f813f310d009 <917a9d02182ac8b4f25eb47dc02f3ec679608c24; version=55482edc25f0606851de42e73618f813f310d009 <a778912b4a53587ea07d85526d152f85d109cbfe; version=55482edc25f0606851de42e73618f813f310d009 <e441db07f208184e0466abf44b389a81d70c340e; version=55482edc25f0606851de42e73618f813f310d009 <ecbb12caf399d7cf364b7553ed5aebeaa2f255bc; version=55482edc25f0606851de42e73618f813f310d009 <f0923011c1261b33a2ac1de349256d39cb750dd0
Siemens · RUGGEDCOM RST2428Pversion=0 <V4.0

Published CVSS scores

4.7Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Siemens ProductCERTCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
9.8Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-20Improper Input Validation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo