CyberSecBulletin
CVE-2025-39710NVD status: Modified

Linux: Out-of-bounds Read

Published Updated By the CyberSecBulletin desk

CVE-2025-39710 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 0520c89f6280d2b60ab537d5743601185ee7d8ab, f5b7a943055a4a106d40a03bacd940e28cc1955f, ef09b96665f16f3f0bac4e111160e6f24f1f8791 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.18% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to 0520c89f6280d2b60ab537d5743601185ee7d8ab or f5b7a943055a4a106d40a03bacd940e28cc1955f or ef09b96665f16f3f0bac4e111160e6f24f1f8791 or 7638bae4539dcebc3f68fda74ac35d73618ec440, whichever matches your release line, or a later version.
  2. Update SIMATIC CN 4100 to V5.0 or a later version.
  3. Update Linux Kernel to 5.4.297 or 5.10.241 or 5.15.190 or 6.1.149, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinuxd96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, 0520c89f6280d2b60ab537d5743601185ee7d8ab; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, f5b7a943055a4a106d40a03bacd940e28cc1955f; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, ef09b96665f16f3f0bac4e111160e6f24f1f8791; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, 7638bae4539dcebc3f68fda74ac35d73618ec440; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, ba567c2e52fbcf0e20502746bdaa79e911c2e8cf; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, 2d8cea8310a245730816a1fd0c9fa4a5a3bdc68c; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, f0cbd9386f974d310a0d20a02e4a1323e95ea654; d96d3f30c0f2f564f6922bf4ccdf4464992e31fb up to, but not including, 49befc830daa743e051a65468c05c2ff9e8580e6; and 1 more ranges0520c89f6280d2b60ab537d5743601185ee7d8ab, f5b7a943055a4a106d40a03bacd940e28cc1955f, ef09b96665f16f3f0bac4e111160e6f24f1f8791, 7638bae4539dcebc3f68fda74ac35d73618ec440, ba567c2e52fbcf0e20502746bdaa79e911c2e8cf, 2d8cea8310a245730816a1fd0c9fa4a5a3bdc68c
SiemensSIMATIC CN 4100before V5.0V5.0
LinuxLinux Kernel4.13 up to, but not including, 5.4.297; 5.5 up to, but not including, 5.10.241; 5.11 up to, but not including, 5.15.190; 5.16 up to, but not including, 6.1.149; 6.2 up to, but not including, 6.6.103; 6.7 up to, but not including, 6.12.44; 6.13 up to, but not including, 6.16.45.4.297, 5.10.241, 5.15.190, 6.1.149, 6.6.103, 6.12.44
DebianDebian Linux11.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.8HighCNA
CVSS 3.17.1HighNVD

Official description

In the Linux kernel, the following vulnerability has been resolved: media: venus: Add a check for packet size after reading from shared memory Add a check to ensure that the packet size does not exceed the number of available words after reading the packet header from shared memory. This ensures that the size provided by the firmware is safe to process and prevent potential out-of-bounds memory access.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

How developers prevent this class of flaw

  • Use a language that provides appropriate memory abstractions.

More Out-of-bounds Read vulnerabilities (CWE-125)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Recent Out-of-bounds Read vulnerabilities

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