CVE-2025-21687

High

In the Linux kernel, the following vulnerability has been resolved: vfio/platform: check the bounds of read/write syscalls count and offset are passed from user space and not checked, only offset is capped to 40 bits, which can be used to read/write out of bounds of the device.

Package Linux Kernel
Published 2025-02-10
Last modified 2025-11-03
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-125

CVE-2025-21687 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.1 and later are affected. Fixed in 5.4.290, 5.4.291, 5.10.234, 5.10.235, 5.15.178, 5.15.179, 6.1.128, 6.1.129, 6.6.75, 6.12.12, 6.13.1, 6.14 and their respective stable series.

Affected from
≥ 4.1
Fixed in
✓ 5.4.290 5.4.x ✓ 5.4.291 5.4.x ✓ 5.10.234 5.10.x ✓ 5.10.235 5.10.x ✓ 5.15.178 5.15.x ✓ 5.15.179 5.15.x ✓ 6.1.128 6.1.x ✓ 6.1.129 6.1.x ✓ 6.6.75 6.6.x ✓ 6.12.12 6.12.x ✓ 6.13.1 6.13.x ✓ 6.14

References

14 total
Showing 5 of 14 references View all on NVD

Frequently asked questions

  • What is CVE-2025-21687?

    CVE-2025-21687 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . It affects Linux kernel versions from 4.1 onward and has been patched in 5.4.290, 5.4.291, 5.10.234 and others. CVE-2025-21687 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-21687?

    CVE-2025-21687 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2025-21687?

    Yes. CVE-2025-21687 has been patched. Fixed versions include 5.4.290, 5.4.291, 5.10.234 and others. If you are running Linux kernel 4.1 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-21687 actively exploited?

    No. CVE-2025-21687 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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