CVE-2025-39710

Kernel memory exposure via unchecked firmware packet size

Published Sep 5, 2025 · Updated Sep 5, 2025

Out-of-bounds read in the Venus HFI driver in Linux allows local users to access kernel memory via malformed firmware packets. In venus_read_queue, the driver copied a packet from the shared queue without verifying that hfi_pkt_hdr.size matched the available word count before processing. Exploitation requires local low-privileged access and a Venus firmware response with an inconsistent size; published sources do not identify the resulting failure mode.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Venus HFI driver in Linux allows local users to access kernel memory via malformed firmware packets. In venus_read_queue, the driver copied a packet from the shared queue without verifying that hfi_pkt_hdr.size matched the available word count before processing. Exploitation requires local low-privileged access and a Venus firmware response with an inconsistent size; published sources do not identify the resulting failure mode.

The record

CVE
CVE-2025-39710
Published
Sep 5, 2025
Updated
Sep 5, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 2025Record 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=4.13
  2. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <0520c89f6280d2b60ab537d5743601185ee7d8ab
  3. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <2d8cea8310a245730816a1fd0c9fa4a5a3bdc68c
  4. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <49befc830daa743e051a65468c05c2ff9e8580e6
  5. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <7638bae4539dcebc3f68fda74ac35d73618ec440
  6. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <ba567c2e52fbcf0e20502746bdaa79e911c2e8cf
  7. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <ef09b96665f16f3f0bac4e111160e6f24f1f8791
  8. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <f0cbd9386f974d310a0d20a02e4a1323e95ea654
  9. Affected versionversion=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <f5b7a943055a4a106d40a03bacd940e28cc1955f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.13; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <0520c89f6280d2b60ab537d5743601185ee7d8ab; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <2d8cea8310a245730816a1fd0c9fa4a5a3bdc68c; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <49befc830daa743e051a65468c05c2ff9e8580e6; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <7638bae4539dcebc3f68fda74ac35d73618ec440; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <ba567c2e52fbcf0e20502746bdaa79e911c2e8cf; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <ef09b96665f16f3f0bac4e111160e6f24f1f8791; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <f0cbd9386f974d310a0d20a02e4a1323e95ea654; version=d96d3f30c0f2f564f6922bf4ccdf4464992e31fb <f5b7a943055a4a106d40a03bacd940e28cc1955f

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.8kernel.orgCVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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

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