Linux Kernel up to 6.6.159/6.12.112/6.18.56/7.2.10 Bluetooth rfcomm_recv_data memory leak

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k1.20-

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.159/6.12.112/6.18.56/7.2.10 and classified as critical. This affects the function rfcomm_recv_data of the component Bluetooth. The manipulation results in memory leak. This vulnerability is identified as CVE-2026-99010. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.6.159/6.12.112/6.18.56/7.2.10. Affected is the function rfcomm_recv_data of the component Bluetooth. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: free the skb when the DLC has no owner rfcomm_recv_data() hands the skb to d->data_ready() and returns 0 without freeing it, so the callback owns the skb from that point on. The tty implementation frees it when the DLC has been detached from its device: static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb) { struct rfcomm_dev *dev = dlc->owner; if (!dev) { kfree_skb(skb); return; } The socket implementation returns without freeing it, and the skb is leaked. A connected DLC can have no owner: rfcomm_sock_destruct() clears d->owner, while the DLC itself stays on the session until it is closed. Data frames that arrive in that window still find d->state == BT_CONNECTED in rfcomm_recv_data() and are handed to the callback, one leaked skb each. The leak does not stop on its own either. The remote runs out of credits only once RFCOMM_RX_THROTTLED is set, and for a socket the only place that sets it is rfcomm_sk_data_ready() itself, below the return. rfcomm_process_dlcs() keeps granting credits, so the remote keeps sending and the leak keeps growing. Free the skb, as the tty side does.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-99010 since 09/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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 10/23/2026). The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 6.6.160, 6.12.113, 6.18.57 or 7.2.11 eliminates this vulnerability. Applying the patch a54ce160e3ef7e50ec94e0ac4131c3d0f9f739b9/c3f76b025cbbb0ab47310dbe7de18092d89f2a99/4f46de658ce61968aef5ea7ae809d1c180330544/b8814161b14c610b7a09527433301d8ad8180aef/9d1afbf60ed53c5b051cd124153e0ae3078c8b93 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
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 6.6.160/6.12.113/6.18.57/7.2.11
Patch: a54ce160e3ef7e50ec94e0ac4131c3d0f9f739b9/c3f76b025cbbb0ab47310dbe7de18092d89f2a99/4f46de658ce61968aef5ea7ae809d1c180330544/b8814161b14c610b7a09527433301d8ad8180aef/9d1afbf60ed53c5b051cd124153e0ae3078c8b93

Timelineinfo

09/25/2026 CVE reserved
10/23/2026 +28 days Advisory disclosed
10/23/2026 +0 days VulDB entry created
10/23/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-99010 (🔒)
GCVE (CVE): GCVE-0-2026-99010
GCVE (VulDB): GCVE-100-425856

Entryinfo

Created: 10/23/2026 15:42
Changes: 10/23/2026 15:42 (59)
Complete: 🔍
Cache ID: 216::103

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