Linux Kernel up to 6.17.8 Bluetooth 6lowpan.c skb_reset_mac_header denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.17.8. Affected by this issue is the function skb_reset_mac_header of the file 6lowpan.c of the component Bluetooth. The manipulation leads to denial of service. This vulnerability is listed as CVE-2025-40282. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.17.8 and classified as critical. This issue affects the function skb_reset_mac_header of the file 6lowpan.c of the component Bluetooth. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: 6lowpan: reset link-local header on ipv6 recv path Bluetooth 6lowpan.c netdev has header_ops, so it must set link-local header for RX skb, otherwise things crash, eg. with AF_PACKET SOCK_RAW Add missing skb_reset_mac_header() for uncompressed ipv6 RX path. For the compressed one, it is done in lowpan_header_decompress(). Log: (BlueZ 6lowpan-tester Client Recv Raw - Success) ------ kernel BUG at net/core/skbuff.c:212! Call Trace: <IRQ> ... packet_rcv (net/packet/af_packet.c:2152) ... <TASK> __local_bh_enable_ip (kernel/softirq.c:407) netif_rx (net/core/dev.c:5648) chan_recv_cb (net/bluetooth/6lowpan.c:294 net/bluetooth/6lowpan.c:359) ------

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-40282 since 04/16/2025. The exploitation is known to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 277664 (Linux Distros Unpatched Vulnerability : CVE-2025-40282), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59 or 6.17.9 eliminates this vulnerability. Applying the patch ea46a1d217bc82e01cf3d0424e50ebfe251e34bf/973e0271754c77db3e1b6b69adf2de85a79a4c8b/d566e9a2bfc848941b091ffd5f4e12c4e889d818/4ebb90c3c309e6375dc3e841af92e2a039843e62/c24ac6cfe4f9a47180a65592c47e7a310d2f9d93/11cd7e068381666f842ad41d1cc58eecd0c75237/70d84e7c3a44b81020a3c3d650a64c63593405bd/3b78f50918276ab28fb22eac9aa49401ac436a3b 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 (277664), EUVD (EUVD-2025-201573) and CERT Bund (WID-SEC-2025-2756). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp FAS
  • NetApp AFF
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

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

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
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: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 277664
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40282

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.302/5.10.247/5.15.197/6.1.159/6.6.117/6.12.59/6.17.9
Patch: ea46a1d217bc82e01cf3d0424e50ebfe251e34bf/973e0271754c77db3e1b6b69adf2de85a79a4c8b/d566e9a2bfc848941b091ffd5f4e12c4e889d818/4ebb90c3c309e6375dc3e841af92e2a039843e62/c24ac6cfe4f9a47180a65592c47e7a310d2f9d93/11cd7e068381666f842ad41d1cc58eecd0c75237/70d84e7c3a44b81020a3c3d650a64c63593405bd/3b78f50918276ab28fb22eac9aa49401ac436a3b

Timelineinfo

04/16/2025 CVE reserved
12/07/2025 +235 days Advisory disclosed
12/07/2025 +0 days VulDB entry created
02/23/2026 +78 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40282 (🔒)
GCVE (CVE): GCVE-0-2025-40282
GCVE (VulDB): GCVE-100-334643
EUVD: 🔒
CERT Bund: WID-SEC-2025-2756 - Linux Kernel: Mehrere Schwachstellen erm&ouml;glichen Denial of Service

Entryinfo

Created: 12/07/2025 08:56
Updated: 02/23/2026 06:41
Changes: 12/07/2025 08:56 (60), 12/07/2025 09:47 (1), 12/07/2025 09:54 (1), 12/09/2025 01:45 (2), 12/09/2025 08:12 (7), 01/04/2026 13:21 (1), 01/22/2026 09:03 (1), 02/23/2026 06:41 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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