Linux Kernel up to 7.2-rc4 mt7615 mt7615_rx_check/mt7615_queue_rx_skb null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k1.07+

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. It has been classified as critical. This impacts the function mt7615_rx_check/mt7615_queue_rx_skb of the component mt7615. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2026-68195. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. It has been rated as critical. This issue affects the function mt7615_rx_check/mt7615_queue_rx_skb of the component mt7615. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7615_rx_check() and mt7615_queue_rx_skb() dispatch it to mt7615_mac_tx_free() on every bus. mt7615_mac_tx_free() cleans the DMA tx queues with mt76_queue_tx_cleanup(), which calls queue_ops->tx_cleanup(). Only the mmio queue ops implement that callback; on the mt7663 USB and SDIO buses it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX worker. Same defect as the mt7921 and mt7925 patches in this series. Drop the event on non-mmio buses via mt76_is_mmio(), as in commit 5683e1488aa9 ("wifi: mt76: connac: do not check WED status for non-mmio devices").

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-68195 since 07/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2026).

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5/88c98ef247a3126fea9bbbda953a18a2f36c3ea7/ab4d213393e846baa6437497f94dda7553cbeda7/b2ab73b8123ce6cf2bc32634bfee4928676ffa66/39afc46c0243d10b7795e6e6cf4ae91f41732120 is able to eliminate this problem.

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

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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: Null pointer dereference
CWE: CWE-476 / 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 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc5
Patch: f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5/88c98ef247a3126fea9bbbda953a18a2f36c3ea7/ab4d213393e846baa6437497f94dda7553cbeda7/b2ab73b8123ce6cf2bc32634bfee4928676ffa66/39afc46c0243d10b7795e6e6cf4ae91f41732120

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68195 (🔒)
GCVE (CVE): GCVE-0-2026-68195
GCVE (VulDB): GCVE-100-387539

Entryinfo

Created: 08/10/2026 15:56
Changes: 08/10/2026 15:56 (59)
Complete: 🔍
Cache ID: 216::103

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