VDB-314676 · CVE-2025-38107 · Nessus 243421

Linux Kernel up to fffa19b5e58c34004a0d6f642d9c24b11d213994 net_sched ets_qdisc_change race condition

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5.7	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel. Affected is the function ets_qdisc_change of the component net_sched. The manipulation results in race condition. This vulnerability is identified as CVE-2025-38107. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel. Affected is the function ets_qdisc_change of the component net_sched. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: fix a race in ets_qdisc_change() Gerrard Tai reported a race condition in ETS, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-38107 since 04/16/2025. The exploitability is told to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 243421 (Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-098)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3 or 6.16-rc2 eliminates this vulnerability. Applying the patch eb7b74e9754e1ba2088f914ad1f57a778b11894b/0b479d0aa488cb478eb2e1d8868be946ac8afb4f/347867cb424edae5fec1622712c8dd0a2c42918f/0383b25488a545be168744336847549d4a2d3d6c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3/fed94bd51d62d2e0e006aa61480e94e5cd0582b0/d92adacdd8c2960be856e0b82acc5b7c5395fddb is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (243421) and CERT Bund (WID-SEC-2025-1452). Once again VulDB remains the best source for vulnerability data.

Affected

Google Container-Optimized OS
Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
IBM QRadar SIEM
SUSE openSUSE
RESF Rocky Linux
Dell Avamar
Open Source Linux Kernel
Dell NetWorker
Dell Secure Connect Gateway

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 243421
Nessus Name: Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-098)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Timelineinfo

04/16/2025 CVE reserved
07/03/2025 +78 days Advisory disclosed
07/03/2025 +0 days VulDB entry created
04/17/2026 +288 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38107 (🔒)
GCVE (CVE): GCVE-0-2025-38107
GCVE (VulDB): GCVE-100-314676
CERT Bund: WID-SEC-2025-1452 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 07/03/2025 11:36
Updated: 04/17/2026 22:52
Changes: 07/03/2025 11:36 (58), 08/05/2025 16:59 (2), 08/23/2025 16:23 (7), 09/21/2025 15:38 (1), 11/09/2025 11:48 (1), 12/06/2025 03:20 (1), 12/16/2025 18:34 (12), 04/17/2026 22:52 (1)
Complete: 🔍
Cache ID: 216::103