Linux Kernel up to 6.15.1 thunderbolt tb_cfg_request_dequeue denial of service

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5.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.15.1. Affected is the function tb_cfg_request_dequeue of the component thunderbolt. Performing a manipulation results in denial of service. This vulnerability is identified as CVE-2025-38174. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.15.1. This affects the function tb_cfg_request_dequeue of the component thunderbolt. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Do not double dequeue a configuration request Some of our devices crash in tb_cfg_request_dequeue(): general protection fault, probably for non-canonical address 0xdead000000000122 CPU: 6 PID: 91007 Comm: kworker/6:2 Tainted: G U W 6.6.65 RIP: 0010:tb_cfg_request_dequeue+0x2d/0xa0 Call Trace: <TASK> ? tb_cfg_request_dequeue+0x2d/0xa0 tb_cfg_request_work+0x33/0x80 worker_thread+0x386/0x8f0 kthread+0xed/0x110 ret_from_fork+0x38/0x50 ret_from_fork_asm+0x1b/0x30 The circumstances are unclear, however, the theory is that tb_cfg_request_work() can be scheduled twice for a request: first time via frame.callback from ring_work() and second time from tb_cfg_request(). Both times kworkers will execute tb_cfg_request_dequeue(), which results in double list_del() from the ctl->request_queue (the list poison deference hints at it: 0xdead000000000122). Do not dequeue requests that don't have TB_CFG_REQUEST_ACTIVE bit set.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-38174 since 04/16/2025. The exploitability is told to be difficult. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 249177 (Debian dsa-5973 : affs-modules-6.1.0-37-4kc-malta-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.33, 6.14.11, 6.15.2 or 6.16-rc1 eliminates this vulnerability. Applying the patch e49e994cd83705f7ca30eda1e304abddfd96a37a/0a3011d47dbc92a33621861c423cb64833d7fe57/2f62eda4d974c26bc595425eafd429067541f2c9/85286e634ebbaf9c0fb1cdf580add2f33fc7628c/5a057f261539720165d03d85024da2b52e67f63d/eb2d5e794fb966b3ef8bde99eb8561446a53509f/0771bcbe2f6e5d5f263cf466efe571d2754a46da/cdb4feab2f39e75a66239e3a112beced279612a8/0f73628e9da1ee39daf5f188190cdbaee5e0c98c 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 (249177), EUVD (EUVD-2025-20015) and CERT Bund (WID-SEC-2025-1461). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: 249177
Nessus Name: Debian dsa-5973 : affs-modules-6.1.0-37-4kc-malta-di - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.295/5.10.239/5.15.186/6.1.142/6.6.94/6.12.33/6.14.11/6.15.2/6.16-rc1
Patch: e49e994cd83705f7ca30eda1e304abddfd96a37a/0a3011d47dbc92a33621861c423cb64833d7fe57/2f62eda4d974c26bc595425eafd429067541f2c9/85286e634ebbaf9c0fb1cdf580add2f33fc7628c/5a057f261539720165d03d85024da2b52e67f63d/eb2d5e794fb966b3ef8bde99eb8561446a53509f/0771bcbe2f6e5d5f263cf466efe571d2754a46da/cdb4feab2f39e75a66239e3a112beced279612a8/0f73628e9da1ee39daf5f188190cdbaee5e0c98c

Timelineinfo

04/16/2025 CVE reserved
07/04/2025 +79 days Advisory disclosed
07/04/2025 +0 days VulDB entry created
12/19/2025 +168 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38174 (🔒)
GCVE (CVE): GCVE-0-2025-38174
GCVE (VulDB): GCVE-100-314841
EUVD: 🔒
CERT Bund: WID-SEC-2025-1461 - Linux Kernel: Mehrere Schwachstellen erm&ouml;glichen Denial of Service

Entryinfo

Created: 07/04/2025 13:00
Updated: 12/19/2025 03:25
Changes: 07/04/2025 13:00 (59), 07/07/2025 12:10 (1), 08/13/2025 19:43 (2), 09/29/2025 03:43 (7), 12/19/2025 03:25 (13)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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