What is CVE-2025-21997?

CVE-2025-21997 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Integer Overflow flaw (CWE-190), affecting Linux kernel versions from 5.16 onward and patched in 6.1.132, 6.6.85, 6.12.21 and others. CVE-2025-21997 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21997?

CVE-2025-21997 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-21997?

Yes, CVE-2025-21997 has been patched. Fixed versions include 6.1.132, 6.6.85, 6.12.21 and others. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21997 actively exploited?

CVE-2025-21997 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/190.html

CVE-2025-21997

Medium

In the Linux kernel, the following vulnerability has been resolved: xsk: fix an integer overflow in xp_create_and_assign_umem() Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lead to two different XDP buffers pointing to the same memory area. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with SVACE.

Package Linux Kernel

Published 2025-04-03

Last modified 2025-11-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-190

CVE-2025-21997 is a Integer Overflow vulnerability

What is Integer Overflow?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.16 and later are affected. Fixed in 6.1.132, 6.6.85, 6.12.21, 6.13.9, 6.14 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 6.1.132 6.1.x ✓ 6.6.85 6.6.x ✓ 6.12.21 6.12.x ✓ 6.13.9 6.13.x ✓ 6.14

References

6 total

Kernel Git
https://git.kernel.org/stable/c/130290f44bce0eead2b827302109afc3fe189ddd

Patch
Kernel Git
https://git.kernel.org/stable/c/205649d642a5b376724f04f3a5b3586815e43d3b

Patch
Kernel Git
https://git.kernel.org/stable/c/559847f56769037e5b2e0474d3dbff985b98083d

Patch
Kernel Git
https://git.kernel.org/stable/c/b7b4be1fa43294b50b22e812715198629806678a

Patch
Kernel Git
https://git.kernel.org/stable/c/c7670c197b0f1a8726ad5c87bc2bf001a1fc1bbd

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2025-21997

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-04-03

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21997?

CVE-2025-21997 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Integer Overflow flaw (CWE-190) . It affects Linux kernel versions from 5.16 onward and has been patched in 6.1.132, 6.6.85, 6.12.21 and others. CVE-2025-21997 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21997?

CVE-2025-21997 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-21997?

Yes. CVE-2025-21997 has been patched. Fixed versions include 6.1.132, 6.6.85, 6.12.21 and others. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21997 actively exploited?

No. CVE-2025-21997 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.