Linux Kernel up to 7.3-rc4 Bnep core.c bnep_rx_frame/bnep_ctrl_frame/bnep_net_xmit len out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k1.36-

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.3-rc4. This affects the function bnep_rx_frame/bnep_ctrl_frame/bnep_net_xmit of the file net/bluetooth/bnep/core.c of the component Bnep. The manipulation of the argument len results in out-of-bounds. This vulnerability is known as CVE-2026-98602. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.3-rc4. Affected is the function bnep_rx_frame/bnep_ctrl_frame/bnep_net_xmit of the file net/bluetooth/bnep/core.c of the component Bnep. The manipulation of the argument len with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: fix out-of-bounds reads on short RX/TX frames and control fallthrough Fix multiple out-of-bounds reads in Bluetooth BNEP frame processing: 1. In bnep_rx_frame() and bnep_ctrl_frame() (net/bluetooth/bnep/core.c), use pskb_may_pull() to verify the BNEP header, control type byte, filter count, and extension headers exist before reading them, and return 0 after handling BNEP_CONTROL instead of falling through to Ethernet frame submission when no extension headers follow. 2. In bnep_net_xmit() (net/bluetooth/bnep/netdev.c), verify skb->len >= ETH_HLEN with pskb_may_pull() before reading the 14-byte Ethernet header to prevent an out-of-bounds heap read and infoleak on short AF_PACKET TX frames.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-98602 since 09/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/18/2026).

Upgrading to version 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.55, 7.2.9 or 7.3-rc5 eliminates this vulnerability. Applying the patch 7af80ad2cebfe2f1879d6a39a1aaa061d9c4e1ca/667aa703e11cdc237d169393bc6a5ea9acbb33c2/3e605ff5932afe0970c2beca66f2f1ba2babe4dd/035f9b1809861967e58ce652680d70ea1502058f/1e7aebc188f889b56c3aaeb6133ef6d77022c887/8f31031326994d1abfcc6ebb6927ef96e51fb9ff/ad0d2d4ada51321db787262ef343193c712b76b5/f0ca020cbb9bb7f3f4ea8ba1dfcf30a282aec91e is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.271/5.15.222/6.1.189/6.6.158/6.12.112/6.18.55/7.2.9/7.3-rc5
Patch: 7af80ad2cebfe2f1879d6a39a1aaa061d9c4e1ca/667aa703e11cdc237d169393bc6a5ea9acbb33c2/3e605ff5932afe0970c2beca66f2f1ba2babe4dd/035f9b1809861967e58ce652680d70ea1502058f/1e7aebc188f889b56c3aaeb6133ef6d77022c887/8f31031326994d1abfcc6ebb6927ef96e51fb9ff/ad0d2d4ada51321db787262ef343193c712b76b5/f0ca020cbb9bb7f3f4ea8ba1dfcf30a282aec91e

Timelineinfo

09/25/2026 CVE reserved
10/18/2026 +23 days Advisory disclosed
10/18/2026 +0 days VulDB entry created
10/18/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98602 (🔒)
GCVE (CVE): GCVE-0-2026-98602
GCVE (VulDB): GCVE-100-422100

Entryinfo

Created: 10/18/2026 20:20
Changes: 10/18/2026 20:20 (61)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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