What is CVE-2025-38477?

CVE-2025-38477 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, classified as a Race Condition flaw (CWE-362), affecting Linux kernel versions from 3.8 onward and patched in 5.4.297, 5.10.241, 5.15.190 and others. CVE-2025-38477 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38477?

CVE-2025-38477 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-38477?

Yes, CVE-2025-38477 has been patched. Fixed versions include 5.4.297, 5.10.241, 5.15.190 and others. If you are running Linux kernel 3.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38477 actively exploited?

CVE-2025-38477 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2025-38477

Medium

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.

Package Linux Kernel

Published 2025-07-28

Last modified 2026-05-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2025-38477 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.8 and later are affected. Fixed in 5.4.297, 5.10.241, 5.15.190, 6.1.147, 6.6.100, 6.12.40, 6.15.8, 6.16 and their respective stable series.

Affected from

≥ 3.8

Fixed in

✓ 5.4.297 5.4.x ✓ 5.10.241 5.10.x ✓ 5.15.190 5.15.x ✓ 6.1.147 6.1.x ✓ 6.6.100 6.6.x ✓ 6.12.40 6.12.x ✓ 6.15.8 6.15.x ✓ 6.16

References

11 total

Kernel Git
https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6

Patch
Kernel Git
https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64

Patch
Kernel Git
https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1

Patch
Kernel Git
https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d

Patch
Kernel Git
https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79

Patch

Showing 5 of 11 references View all on NVD

Details

CVE ID CVE-2025-38477

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.1

Published 2025-07-28

Modified 2026-05-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38477?

CVE-2025-38477 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a Race Condition flaw (CWE-362) . It affects Linux kernel versions from 3.8 onward and has been patched in 5.4.297, 5.10.241, 5.15.190 and others. CVE-2025-38477 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38477?

CVE-2025-38477 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-38477?

Yes. CVE-2025-38477 has been patched. Fixed versions include 5.4.297, 5.10.241, 5.15.190 and others. If you are running Linux kernel 3.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38477 actively exploited?

No. CVE-2025-38477 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.