What is CVE-2025-39803?

CVE-2025-39803 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.16.4 and 6.17. CVE-2025-39803 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39803?

CVE-2025-39803 has a CVSS score of 7.8 out of 10, rated High severity. 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-2025-39803?

Yes, CVE-2025-39803 has been patched. Fixed versions include 6.16.4 and 6.17. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39803 actively exploited?

CVE-2025-39803 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-39803

High

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Remove WARN_ON_ONCE() call from ufshcd_uic_cmd_compl() The UIC completion interrupt may be disabled while an UIC command is being processed. When the UIC completion interrupt is reenabled, an UIC interrupt is triggered and the WARN_ON_ONCE(!cmd) statement is hit. Hence this patch that removes this kernel warning.

Package Linux Kernel

Published 2025-09-15

Last modified 2025-11-24

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-617

CVE-2025-39803 is classified as CWE-617

See CWE-617 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.16.4, 6.17 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.16.4 6.16.x ✓ 6.17

References

The following references provide additional information about CVE-2025-39803 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/c0cc24c139e0f62859dbf88e050ba074cd93988f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/e5203d89d59bfcbe1f348aa0d2dc4449a8ba644c
Patch

Details

CVE ID CVE-2025-39803

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-09-15

Modified 2025-11-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39803?

CVE-2025-39803 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.16.4 and 6.17. CVE-2025-39803 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39803?

CVE-2025-39803 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-2025-39803?

Yes — CVE-2025-39803 has been patched. Fixed versions include 6.16.4 and 6.17. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39803 actively exploited?

No — CVE-2025-39803 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.